Caffeine increases anaerobic work and restores cycling performance following a protocol designed to lower endogenous carbohydrate availability - Silva-Cavalcante, Marcos David; Correia-Oliveira, Carlos Rafaell; Santos, Ralmony Alcantara; Lopes-Silva, Joao Paulo; Lima, Hessel Marani; Bertuzzi, Rômulo Cássio de Moraes; Duarte, Marcos; Bishop, David John; Lima-Silva, Adriano Eduardo (PLOS ONE, 2013)