1. Adamowski, E.V., Estudos Citologicos em Algumas Especies de Paspalum, Maringa-PR, Brazil: Thes. State Univ. Maringa, 1998.
2. Arora, O.P. and Madhusudana, K.J., Nature of tetraploidy in Matricaria inodora, Cytologia, 1981, vol. 46, no. 4, pp. 773–779.
3. Bolkhovskikh, Z.V., Grif, V.G., Zakhar’eva, O.I., and Matveeva, T.S., Khromosomnye chisla tsvetkovykh rastenii (Chromosome Numbers of Flowering Plants), Leningrad: Nauka, 1969.
4. Butorina, A.K., Muraya, L.S., and Isakov, Yu.N., The influence of growth conditions on the activity of ribosomal cistrons in the Scots pine, in Tez. dokl. Vsesoyuz. konf. “Ekologicheskaya genetika rastenii i zhivotnykh” (Abstr. All-Union Conf. “Ecological Genetics of Plants and Animals”), Chisinau: Shtiintsa, 1981, vol. 1, pp. 11–12.
5. Chikov, P.S., Atlas lekarstvennykh rastenii (Atlas of Medicinal Plants), Moscow: AiF-Print, 2005.