Continuous nesting of Barn Owls in IllinoisWALK, J. W; ESKER, T. L; SIMPSON, S. A et al.The Wilson bulletin (Wilson Ornithological Society). 1999, Vol 111, Num 4, pp 572-573, issn 0043-5643Article

Tracking the long-term decline and recovery of an isolated populationWESTEMEIER, R. L; BRAWN, J. D; SIMPSON, S. A et al.Science (Washington, D.C.). 1998, Vol 282, Num 5394, pp 1695-1698, issn 0036-8075Article

An unsuccessful clutch of northern bobwhites with hatched pheasant eggsWESTEMEIER, R. L; ESKER, T. L; SIMPSON, S. A et al.The Wilson bulletin (Wilson Ornithological Society). 1989, Vol 101, Num 4, pp 640-642, issn 0043-5643Article

Response of Northern Harriers and short-eared owls to grassland management in IllinoisHERKERT, J. R; SIMPSON, S. A; WESTEMEIER, R. L et al.The Journal of wildlife management. 1999, Vol 63, Num 2, pp 517-523, issn 0022-541XArticle