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.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.University of Manchester: Genetic Link to Cot Death: Research finding that babies born with specific variants of three key genes are 14 times more likely to die from cot death.