MUSTAFA, Mustafa Mohammed; AL ATRAM, Abdulrahman A.; MOUSLEH, Mahmoud M. Signs and Symptoms of Vitamin B12 Deficiency and its Impacts on Student’s Academic Performance. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 18, n. 1, p. 143–150, 2014. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/2361. Acesso em: 1 apr. 2026.