1. CHLOROPHYLL LEVELS AND LEAF ULTRASTRUCTURE AS ECOTYPIC CHARACTERS IN XANTHIUM STRUMARIUM L.
2. Taxonomical application of ligule microcharacters in Compositae. I. Anthemideae, Heliantheae and Tageteae;Baagøe J.;Bot. Tidsskrift,1977
3. Taxonomical application of ligule microcharacters in Compositae. II. Arctotideae, Astereae, Calenduleae, Eremothamneae, Inuleae, Liabeae, Mutisieae, and Senecioneae;Baagøe J.;Bot. Tidsskrift,1978
4. SEM studies in ligules of Lactuceae (Compositae);Baagøe J.;Bot. Tidsskrift,1980