1. “LO-analysis” and “Welcker's rule”;ERDTMAN;Svensk bot. Tidskr.,1956
2. ‘Recent trends in palynology’;FAEGRI;Bot. Rev.,1956
3. ‘Sporoderm morphology and morphogenesis. A collocation of data and suppositions’;ERDTMAN;Grana palynol.,1966
4. ‘An electron microscopic study of exine stratification and fine structure’;LARSON;Pollen Spores,1962
5. ‘Systematic implications from electron microscopic studies of composite pollen’;SKVARLA;Ann. Mo. bot. Gdn,1966