Schmund, D, Schurr, U and Jähne, B (2000). 
Optical leaf growth analysis. 
Computer Vision and Applications - A Guide for Students and Practitioners. Academic Press. 640-641
  Kümmerlen, B, Dauwe, S, Schmund, D, Schurr, U, Jähne, B and Haußecker, H (2000). 
Thermography to measure water relations of plant leaves. 
Computer Vision and Applications. A Guide for Students and Practitioners. Academic Press. 636--637