1. Exogenous and endogenous components in Circadian Rhythms;Aschoff,1960
2. Circadian Clocks,1965
3. Circadian activity with two peaks;Aschoff;Ecology,1966
4. Studies of the biology and rhythmic behaviour patterns of freshwater gastropod molluscs;Beeston,1977
5. The locomotor rhythm of a tropical freshwater prosobranch;Beeston;J. moll. Stud,1977