Borrell, Josefa Gardeñas, and Isília Aparecida Silva. “Gastric Probe Used in Pré-Term Newborn: Study of the Alteration in Flexibility of Constituent Polymer”. Revista Da Escola De Enfermagem Da USP, vol. 34, no. 3, Sept. 2000, pp. 302-8, https://doi.org/10.1590/S0080-62342000000300012.