by Schemske, D.W, Husband, B.C, Ruckelshaus, M.H, Goodwillie, C, Parker, I.M, Bishop, J.G
Published in Ecology (Durham) (01.04.1994)

by Williams, Susan L., Ruckelshaus, Mary H.
Published in Ecology (Durham) (01.04.1993)

by Cox, P.A, Laushman, R.H, Ruckelshaus, M.H
Published in Botanical journal of the Linnean Society (01.06.1992)