1. Electron microscope observations on Mallomonas species and remarks on their occurrence in some Danish ponds and lakes. III.;Asmund;Dansk. Bot. Ark.,1959
2. Asmund , B. Personal communication
3. Studies on some Chrysophyceae from some ponds and lakes in Alaska. I.;Asmund;Hydrobiology,1961
4. Algues rares et nouvelles des mares de la Foret de Fontainebleau.;Bourelly;Rev. Gen. Bot.,1947
5. A technique for the examination of a single specimen in both light and electron microscopes.;Bradley;Mikroskopie,1957