Sleep is more sensitive to high doses of caffeine in the middle years of life
Journal of Psychopharmacology (2015) - Comment
pubmed: 25759402  doi: 10.1177/0269881115575535  issn: 1461-7285  issn: 0269-8811 

Rébecca Robillard, Maude Bouchard, Annick Cartier, Laurence Nicolau, Julie Carrier