Papers finding effects of electromagnetic fields from Wi-Fi transmitters or effects of microwaves at exposures relevant for someone using a Wi-Fi-enabled computer:
Avendaño C. et al., 2010. Laptop expositions affect motility and induce DNA fragmentation in human spermatozoa in vitro by a non-thermal effect: a preliminary report. American Society for Reproductive Medicine 66th Annual Meeting: O-249 http://wifiinschools.org.uk/resources/laptops+and+sperm.pdf
Balmori A. 2010. Mobile phone mast effects on common frog (Rana temporaria) tadpoles: the city turned into a laboratory. Electromagn. Biol. Med. 29(1-2):31-35. http://www.ncbi.nlm.nih.gov/pubmed/20560769
Erdinc O. O. et al., 2003. Electromagnetic waves of 900MHz in acute pentylenetetrazole model in ontogenesis in mice. Neurol. Sci. 24:111-116. http://www.ncbi.nlm.nih.gov/pubmed/14600821
Fesenko E. E. et al., 1999. Stimulation of murine natural killer cells by weak electromagnetic waves in the centimeter range. Biofizika 44:737–741. http://www.ncbi.nlm.nih.gov/pubmed/10544828
Fesenko E. E. et al., 1999. Microwaves and cellular immunity. I. Effect of whole body microwave irradiation on tumor necrosis factor production in mouse cells, Bioelectrochem. Bioenerg. 49:29–35. http://www.ncbi.nlm.nih.gov/pubmed/10619445
Havas M. et al., 2010. Provocation study using heart rate variability shows microwave radiation from 2.4GHz cordless phone affects autonomic nervous system. European Journal of Oncology Library Vol. 5: 273-300. http://www.icems.eu/papers.htm?f=/c/a/2009/12/15/MNHJ1B49KH.DTL part 2.
Kesari K. K. and Behari J., 2009. Microwave exposure affecting reproductive system in male rats. Appl. Biochem. Biotechnol. 162(2):416-428. http://www.ncbi.nlm.nih.gov/pubmed/19768389
Kesari K. K. and Behari J., 2009. Fifty-gigahertz microwave exposure effect of radiations on rat brain. Appl. Biochem. Biotechnol. 158:126-139. http://www.ncbi.nlm.nih.gov/pubmed/19089649
Khurana V. G. et al., 2010. Epidemiological Evidence for a Health Risk from Mobile Phone Base Stations. Int. J. Occup. Environ. Health 16:263–267. http://www.ncbi.nlm.nih.gov/pubmed/20662418
Maganioti A. E. et al., 2010. Wi-Fi electromagnetic fields exert gender related alterations on EEG. 6th International Workshop on Biological Effects of Electromagnetic fields. http://www.istanbul.edu.tr/6internatwshopbioeffemf/cd/pdf/poster/WI-FI%20ELECTROMAGNETIC%20FIELDS%20EXERT%20GENDER.pdf
Maier R. et al., 2004. Effects of pulsed electromagnetic fields on cognitive processes – a pilot study on pulsed field interference with cognitive regeneration. Acta Neurologica Scandinavica 110: 46-52. http://www.ncbi.nlm.nih.gov/pubmed/15180806
Nittby H. et al., 2008. Cognitive impairment in rats after long-term exposure to GSM-900 mobile phone radiation. Bioelectromagnetics 29: 219-232. http://www.ncbi.nlm.nih.gov/pubmed/18044737
Novoselova E. G. et al., 1998. Stimulation of production of tumor necrosis factor by murine macrophages when exposed in vivo and in vitro to weak electromagnetic waves in the centimeter range Bofizika 43:1132–1333.
Novoselova E. G. et al., 1999. Microwaves and cellular immunity. II. Immunostimulating effects of microwaves and naturally occurring antioxidant nutrients. Bioelectrochem. Bioenerg. 49:37–41. http://www.ncbi.nlm.nih.gov/pubmed/10619446
Otitoloju A. A. et al., 2010. Preliminary study on the induction of sperm head abnormalities in mice, Mus musculus, exposed to radiofrequency radiations from Global System for Mobile Communication Base Stations. Bull. Environ. Contam. Toxicol. 84(1):51-4. http://www.ncbi.nlm.nih.gov/pubmed/19816647
Panagopoulos D. J. et al., 2010. Bioeffects of mobile telephony radiation in relation to its intensity or distance from the antenna. Int. J. Radiat. Biol. Vol 86(5):345-357. http://www.ncbi.nlm.nih.gov/pubmed/20397839
Papageorgiou C. C. et al., 2011. Effects of Wi-Fi signals on the p300 component of event-related potentials during an auditory hayling task. Journal of Integrative Neuroscience 10(2): 189-202. http://www.ncbi.nlm.nih.gov/pubmed/21714138
Persson B. R. R. et al., 1997. Blood-brain barrier permeability in rats exposed to electromagnetic fields used in wireless communication. Wireless Networks 3: 455-461.
Pyrpasopoulou A. et al., 2004. Bone morphogenic protein expression in newborn kidneys after prenatal exposure to radiofrequency radiation. Bioelectromagnetics 25:216-27. http://www.ncbi.nlm.nih.gov/pubmed/15042631
Salama N., Kishimoto T., Kanayama H. and Kagawa S. (2009) Mobile phone decreases fructose but not citrate in rabbit semen: a longitudinal study, Systems Biology in Reproductive Medicine 55:181-187. http://www.ncbi.nlm.nih.gov/pubmed/19938952
Salford L. G. et al., 2010. Effects of microwave radiation upon the mammalian blood-brain barrier. European Journal of Oncology Library Vol. 5:333-355. http://www.icems.eu/papers.htm?f=/c/a/2009/12/15/MNHJ1B49KH.DTL part 2.
Salford L. G., et al., 2003. Nerve cell damage in mammalian brain after exposure to microwaves from GSM mobile phones. Environ. Health Perspect. 111:881-883. http://www.ncbi.nlm.nih.gov/pubmed/12782486