1. Der ruheumsatz von vogeln als funktion der Fageszeit und der dorpergrosse;Aschoff;J. Orn.,1970
2. Physiology and energetics of flight;Berger,1974
3. Respiration, oxygen consumption and heart rate in some birds during rest and flight;Berger;Z. vergl. Physiol.,1970
4. Bird Migrations, Ecological and Physiological Factors,1973
5. Energy metabolism during night of some passerines;Dolnik,1973