Acta Zoologica Fennica. 102-105. 1963-1964, 102: Studies on the dipterous Faunna in Burrows of Voles (Microtus, Clethrionomys) in Finland. 103: Über die Entstehung der Excitatoren und deren Bedeutung für die Evolution der Malachiidae (col.). 104: The internal Concentration in some hypotrichous Ciliates and its Dependence on the external Concentration. 105: An analysis of the spring Migration of the Common Scoter and the Long-tailed Duck in southern Finland   .  Helsinki :  Societas pro Fauna et Flora Fennica,  1963-1964 . 2 sv.