BERNÁTH, J.; BAKÓ, J.; PETHEŐ, F. Improved evaluation method for reliable distinction of poppy (Papaver somniferum L.) cultivars. International Journal of Horticultural Science, [S. l.], v. 5, n. 1-2, p. 68–73., 1999. DOI: 10.31421/IJHS/5/1-2/27. Disponível em: https://ojs.lib.unideb.hu/IJHS/article/view/27. Acesso em: 24 feb. 2021.