Wyckoff, J., Nuszdorfer, F. Johnson, L., Muller, B., Mit, A., Rozelle, J., and Hinke, M. 2010. "Habitat Suitability Indices for Imperilied, Critically Imperiled, Endangered, and Threatened Species and Species of Concern in Colorado." Colorado Department of Transportation, DTD. 110p.
Muller, B., Johnson, L., Wyckoff, J., and Nuszdorfer, F. 2008. "Areawide Coordinated Cumulative Effects Analysis-Phase I." Colorado Department of Transportation DTD Research and Innovation Branch. Rept. No. CDOT-2008-6, 120p.
Muller, Brian, Lynn Johnson, John Wyckoff and Fred Nuszdorfer. 2007. "Areawide Cumulative Effects Analysis Using GIS." Proceedings National Academy of Sciences, Transportation Research Board. 27pp in digital format.
Wyckoff, John W., Lynn E. Johnson, Fred Nuszdorfer, and Ullziisaikhan Vanchindorj. 2004. "Developing Habitat Suitability Models for the I-25 Corridor of Northern Colorado." Colorado Department of Transportation, Rept. No. CDOT -DTD-R-2004-6-Supplement-B Final Report. 66 pp.