K. Krämer, J. Krämer, and A. Heyer. University of Stuttgart, University of Stuttgart, Institute of Biomaterials and Biomolecular Systems, (July 2020)R package version 0.1.
S. Hengherr, A. Heyer, F. Brümmer, and R. Schill. Physiological and Biochemical Zoology: Ecological and Evolutionary Approaches, 84 (2):
147--153(March 2011)