[1]
E. V. dos Santos, R. de C. M. dos S. Frazão, e S. C. de Oliveira, “Feeling of women regarding the use of the Billings Ovulation Method”, Rev Rene, vol. 18, nº 1, p. 11–18, jun. 2017, doi: 10.15253/2175-6783.2017000100003.