OPALKO, O. .; KUCHER, N.; OPALKO, A. Some taxonomic notes on the genus Pyrus L. ordering. Journal of Native and Alien Plant Studies, [S. l.], n. 18, p. 156–190, 2022. Disponível em: http://mchr.sofievka.org/article/view/269974. Acesso em: 27 apr. 2024.