@article{article2ab0981c,
title   = {Vitamin B12 deficiency in infancy as a cause of developmental regression},
author = {Casella, Erasmo Barbante and Valente, Marcelo and Navarro, Jessie Medeiros de and Kok, Fernando},
year = {2005},
doi = {10.1016/j.braindev.2005.02.005},
journal   = {Brain & Development}
}