Parra, J., Astudillo, D., Parra, P. and Sempértegui, F. (2013) “Effect of zinc supplements on the incidence of caries and on the concentration of salivary A immunoglobulins in short stature school children”, Maskana, 4(1), pp. 29–39. doi: 10.18537/mskn.04.01.03.