B. Collins
Wein, G. R., Steward T. A. Pickett, and B. S. Collins. 1988. “Biomass Allocation of Erythronium Americanum Populations in Different Light Intensities”. Ann. Bot. 61: 717-22.
Collins, B. S., and Steward T. A. Pickett. 1988. “Demographic Responses of Herb Layer Species to Experimental Canopy Gaps in a Pennsylvania Forest”. J. Ecol. 76: 437-50.
Collins, B. S., and Steward T. A. Pickett. 1987. “Influence of Canopy Opening on the Environment and Herb Layer in a Northern Hardwoods Forest”. Vegetatio 70: 3-10.