The Zoologist : a monthly journal of natural history (1915)

Zoosystematics and evolution (Pensoft, 2018)

Zur fauna Montenegros und Nordalbaniens. Mollusken, Käfer, Isopoden, Chilopoden, Diplopoden - Wohlberedt, Otto, 1870 -1945 (Adolf Holzhausen, 1909)

Zur Gastropodenfauna von Basel und Umgebung - Bollinger, Gottfried, 1883 -1978 (Werner-Riehm, 1909)

Известия на Царските природонаучни институти в София = Izvestiia na Tsarskitia prirodonauchni instituti v Sofiia - Tsarskitie prirodonauchni instituti (Sofiia, Bulgaria) (Pechatnitsa P. Glushkov, 1936)