G. Wassmer

Photoperiodic Time Measurement and a Graded Response in a Cockroach

T. Page, G. Wassmer, 1993, Journal of biological rhythms.

Nocturnal illumination does not necessarily stimulate the photoperiodic response, despite mimicking the effects of constant light on the circadian system in the male Syrian hamster

A. Bartke, V. Chandrashekar, F. Sulzman, 1990, Physiology & Behavior.

Epidemiology of erectile dysfunction: results of the ‘Cologne Male Survey’

T. H. Klotz, U. Engelmann, G. Wassmer, 2000, International Journal of Impotence Research.

Epidemiology of Peyronie's disease

T. H. Klotz, U. Engelmann, F. Sommer, 2002, International Journal of Impotence Research.

Photoperiodic regulation of hemolymph protein in the woodroach Parcoblatta pennsylvanica

T. Page, G. Wassmer, W. Cain, 1996 .

Daily and Seasonal Rhythms

H. Underwood, T. Page, G. Wassmer, 2011 .

Gravity and light effects on the circadian clock of a desert beetle, Trigonoscelis gigas.

A. M. Alpatov, C. Fuller, W. Rietveld, 2003, Journal of insect physiology.

Neurospora circadian rhythms in space: a reexamination of the endogenous-exogenous question.

C A Fuller, F M Sulzman, C. Fuller, 1984, Science.