1. Fifteen years of bat banding in the Netherlands;Bels L.;Publtiës natuurh. Genoot. Limburg,1952
2. New data on longevity in bats;Heerdt P. F.;Natuurh. Maandbl.,1961
3. Report on mammals;Hurrell H. G.;Trans. Devon. Assoc.,1966
4. Observations during sixteen years on winter roosts of bats in West Suffolk;Stebbings R. E.;Proc. zool. Soc. Lond.,1965