Baptista, J., Moutinho, V., Mateus, V., Guimarães, H., Clemente, F., Almeida, S....Soares, I. (2018). Being a mother of preterm multiples in the context of socioeconomic disadvantage: perceived stress and psychological symptoms. Jornal de Pediatria, 94(5), 491?497. https://doi.org/10.1016/j.jped.2017.08.010