1. Alston, A. H. G., 1931:Rubiaceae. ? InTrimen, H.: A Handbook to the Flora of Ceylon, VI., Suppl., pp. 140?153. ? London: Dulau & Co.
2. Bedi, Y. S., Bir, S. S., Gill, B. S., 1981: Cytopalynology of woody taxa of familyRubiaceae from north and central India. ? Proc. Indian Acad. Sci.47, 708?715.
3. Bir, S. S., Guljeet Singh, Gill, B. S., 1982: InL�ve, A., (Ed.): IOPB chromosome number reports LXXVI. ? Taxon31, 592?593.
4. ?, ?, ?, 1984: InL�ve, A., (Ed.): IOPB chromosome number reports LXXXII. ? Taxon33, 128?129.
5. Bremekamp, C. E. B., 1940: Ist die GattungUrophyllum Wall. in Afrika vertreten? ? Bot. Jahrb.71, 200?227.