Hans Karl Heidemann
Chapter 4 of Section B, U.S. Geological Survey Standards – Book 11, Collection and Delineation of Spatial Data – U.S. Department of the Interior – U.S. Geological Survey
Photogrammetric Engineering & Remote Sensing – Vol. 81, No. 3, March 2015, pp. A1–A26.
2014 American Society for Photogrammetry and Remote Sensing