1. Alimbaeva, P., Nuralieva, Zh., Akimaliev, A., Aslanoekova, R., 1983. Seeking physiological active compounds in flowering plants of Kirghizia. Deposited Doc. VINITI 19, pp. 83–87
2. To chemotaxonomy of Asperula L. species;Borissov;Rast. Resur,1975
3. Iridoids. An update review. Part I;Boros;J. Nat. Prod.,1990
4. Contents of tannins in some species of the Asperula and Galium genera;Buckova;Acta Fac. Pharm. Univ. Comeniana,1970
5. Iridoids and alkanes in twelve species of Galium and Asperula;Corrigan;Phytochemistry,1978