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Bir, S. S., S. Kamra, M. Sidhu & P. Cheema. 1988. Cytomorphological studies on some members of Cyperaceae from north India. J. Cytol. Genet. 23: 14–37.
Cheema, P., S. S. Bir & M. K. Sidhu. 1993. Chromosomal variabilities in Cyperus Linn. II. Section Pycreus (Beauv.) Griseb. from NW India. Cytologia 58: 345–349.