Millington, Richard (2014). "Max Pulver's Himmelpfortgasse: Fictionalizing the 1920s Cocaine Craze in German-Speaking Europe". Central Europe. 12 (2): 159–173. doi:10.1179/1479096314Z.00000000029. S2CID143796468.
Millington, Richard (2014). "Max Pulver's Himmelpfortgasse: Fictionalizing the 1920s Cocaine Craze in German-Speaking Europe". Central Europe. 12 (2): 159–173. doi:10.1179/1479096314Z.00000000029. S2CID143796468.