Pereira, A. P. E., Dias, M. A. B., Bastos, M. H., da Gama, S. g. N., & Leal, M. d. C. (2013). Determining gestational age for public health care users in Brazil: Comparison of methods and algorithm creation. BioMed Central.

Pereira, Ana Paula Esteves, Marcos Augusto Bastos Dias, Maria Helena Bastos, Silvana granado Nogueira da Gama, und Maria do Carmo Leal. Determining Gestational Age for Public Health Care Users in Brazil: Comparison of Methods and Algorithm Creation. BioMed Central, 2013.

Pereira, Ana Paula Esteves, et al. Determining Gestational Age for Public Health Care Users in Brazil: Comparison of Methods and Algorithm Creation. BioMed Central, 2013.