R. Heller

Rumen fluid volume and retention time of digesta in an indigenous and a conventional breed of sheep fed a low quality, fibrous diet

W. Engelhardt, M. Lechner-Doll, H. Weyreter, 1987 .

Retention of fluid and particles in the digestive tract of the llama (Lama guanacoe f. glama).

R. Heller, W. von Engelhardt, V. Cercasov, 1986, Comparative biochemistry and physiology. A, Comparative physiology.

Retention of digesta in the gastrointestinal tract of the guinea pig

W. Engelhardt, E. Sakaguchi, R. Heller, 1986 .

Pattern of motility and flow of digesta in the forestomach of the Llama (Lama guanacoe f.glama)

W. Engelhardt, R. Heller, P. Gregory, 1984, Journal of Comparative Physiology B.

Forestomach fluid volume and retention of fluid and particles in the gastrointestinal tract of the camel (Camelus dromedarius).

H. Weyreter, R. Heller, W. von Engelhardt, 1986, Zentralblatt fur Veterinarmedizin. Reihe A.

Water and energy metabolism in the rock hyrax (Procavia habessinica)

W. Engelhardt, K. Rübsamen, R. Heller, 1979, Journal of comparative physiology.

Control of stomach motility in the llama (Lama guanacoe f. glama).

R. Heller, P. Gregory, W. von Engelhardt, 1985, Quarterly journal of experimental physiology.

Forestomach motility in the camel (Camelus dromedarius).

R. Heller, M. Lechner, W. v Engelhardt, 1986, Comparative biochemistry and physiology. A, Comparative physiology.