- Studies on exudate-depleted sclerotial development in Sclerotium rolfsii and the effect of oxalic acid, sclerotial exudate, and culture filtrate on phenolic acid induction in chickpea (Cicer arietinum). Singh, U.P., Sarma, B.K., Singh, D.P., Bahadur, A. Can. J. Microbiol. (2002)