WONGPIYASATID, A. .; HORMCHAN, P. . Comparison of the Single and Double Flowered Portulaca Varieties in Bee Attraction. Agriculture and Natural Resources, Bangkok, Thailand, v. 35, n. 1, p. 8–13, 2001. Disponível em: https://li01.tci-thaijo.org/index.php/anres/article/view/240314. Acesso em: 3 may. 2024.