For Roemeria
Banfi, E., F. Bartolucci, J.-M. Tison, and G. Galasso. 2022. A new genus for Papaver sect. Meconella and new combinations in Roemeria (Papaveraceae) in Europe and the Mediterranean area. Natural History Sciences. Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano, 9 (1): 67-72.
Kadereit In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.
Morales Torres, C., R. Mendoza Castellón, and A.T. Romero García. 1988. La posición sistemática de Papaver argemone L.: interés evolutivo del orden Papaverales. Lagascalia 15(1): 181-190.
Stace, C.A. 2017. New combinations in six genera of the British flora. New J. of Bot. 7: 9-10.