Ziegler, H. and Lüttge, (1998):
Carbon isotope discrimination in cyanobacteria of inselbergs and soils of savannas in the neotropics.
In: Botanica acta. 111 (1998), S. 212-215, [Article]

Kluge, Manfred and Vinson, B. and Ziegler, H. (1997):
Ecophysiological studies on orchids of Madagascar: incidence and plasticity of crassulacean acid metabolism in speciesof the genus Angraecum Bory.
In: Plant ecology. 135 (1997), S. 43-57, [Article]

Kluge, Manfred and Brulfert, J. and Rauh, W. and Ravelomanana, D. and Ziegler, H. (1995):
Ecophysiological studies on the vegetation of Madagascar ; delta13C and deltaD survey for metabolism (CAM) among orchids from montane forests and succulents from the xerophytic thorn-bush.
In: Isotopes in environmental and health studies. 31 (1995), S. 191-210, [Article]