F. dos S. Silva, D. C. Cavallari, and L. R. L. de Simone, “New records of Helicina schereri (Gastropoda: Helicinidae) from the states of Bahia, Minas Gerais, and Mato Grosso do Sul, Brazil”, Pap. Avulsos Zool., vol. 59, p. e20195903, Jan. 2019, doi: 10.11606/1807-0205/2019.59.03.