The influence of some pterins on the circadian rhythmicity of hydroxyindole-O-methyl transferase in the pineal gland of 42-day old male Wistar rats M. G. M. BALEMANS, J. Van BENTHEM, W. C. LEGERSTEE, A. de MOREE, H. J. P. M. NOTEBORN and I. EBELSReprod. Nutr. Dévelop., 20 4A (1980) 1051-1060DOI: https://doi.org/10.1051/rnd:19800613