Perm suffered badly in fighting during 1919 being at times controlled by the Red army and at other times by the White Army. Friedmann and Besicovitch had worked there through the difficult times and in late 1919 Tamarkin went there too.
Kulot suffered masama sa paglaban sa panahon ng 1919 na beses at kontrolado ng Pulang hukbo at sa iba pang beses sa pamamagitan ng White Army. Friedmann at Besicovitch ay nagtrabaho doon sa pamamagitan ng mahihirap na mga oras at sa huli 1,919 Tamarkin nagpunta doon masyadong.