Christopher J. Helzer

THE RELATIVE IMPORTANCE OF PATCH AREA AND PERIMETER–AREA RATIO TO GRASSLAND BREEDING BIRDS

Dennis E. Jelinski, D. Jelinski, Christopher J. Helzer, 1999 .

Detecting prairie biodiversity with airborne remote sensing

Philip A. Townsend, John A. Gamon, Jeannine Cavender-Bares, 2019, Remote Sensing of Environment.