BBC News: Lung flaw link to cot death risk - Research finding that babies born with specific variants of three key lung genes are 14 times more likely to die from cot death. - http://news.bbc.co.uk/1/hi/health/5278478.stm
New Scientist: Nicotine's double link to cot death - Article discussing research finding that nicotine not only disrupts a baby's breathing, but can also disrupt the early development of neural circuits that guard against breathing cessation during sleep. - http://www.newscientist.com/article.ns?id=dn2771
SidsAlliance.org: Toxic Gas Theory, Mattresses and SIDS - Summarises results from a number of studies into toxic gas theory, and concludes there is a lack of evidence to support the theory as a cause of SIDS. - http://www.sidsalliance.org/FC-PDF4/Research_Position%20Statements/toxic%20gas%20theor%E2%80%A6es%20and%20sid.pdf
Cot Life 2000 - Discusses a theory (now discredited) that cot death is caused by toxic gases released from mattresses, and includes opinions on prevention of cot death. - http://www.cotlife2000.co.nz/