Carvajal, A., Vielma, S., Martín, C., Quijada, P.J., Barboza, J.M., Martínez, J.G., Landaeta, M.E. y Urbaneja, V. 2021. Diphtheria in two pregnant in the context of the epidemic in Venezuela. Gaceta Médica de Caracas. 129, 3 (sep. 2021), 676–684.