(1)
Velandia Castro, N. Y.; Cárdenas Cárdenas, L. M.; Agudelo Cely, N. A. What Do Snack Bars in Schools Offer and What Do Students Eat During Recess Time in the Schools? Study in the City of Tunja, 2009. Hacia Promoc. Salud 2011, 16, 99-109.