WHITTEMORE, A. T. Typification of infrageneric names in Ulmus L. (Ulmaceae). Phytotaxa, Auckland, New Zealand, v. 297, n. 3, p. 291–294, 2017. DOI: 10.11646/phytotaxa.297.3.11. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.297.3.11. Acesso em: 6 dec. 2025.