1. Screaming clouds;Fikke;Weather,2017
2. Mother of pearl clouds over southern Norway, Geofys;Gotaas;Publ.,1961
3. On the physics of mother-of-pearl clouds;Hesstvedt;Geofys. Publ.,1960
4. Perlemorskyer;Mohn;Naturen,1895
5. On the perspective in and dating of Munch's Screaming Clouds - comments on the article by Fikke et al., 2017;Neuhäuser;Weather,2018