1. Essay on the immigration of the Norwegian flora during alternating rainy and dry periods;Blytt;Chria,1876
2. Diploidy, polyploidy, and winter hardiness relationships in the flowering plants;Bowden;Am. J. Bot.,1940
3. Cytotaxonomical studies in the Chrysanthemum Leucanthemum Complex;Bøcher;Watsonia,1957
4. Experimental studies on the nature of species. II. Plant evolution through amphiploidy and autoploidy, with examples from the Madiinae;Clausen;Carnegie Inst. of Wash. Publ.,1945
5. Existence de races chromosomiques chez Chrysanthemum alpinum L.; leur repartition dans les Alpes;Contandriopoulos;Rev. générale de Bot,1959