1. A botanist's notes on Pinta;Adsersen;Noticias de Galápagos,1976
2. Ombrophytum peruvianum (Balanophoraceae) found in the Galápagos Islands;Adsersen;Bot. Not.,1976
3. New records of pteridophytes from the Galápagos Islands;Adsersen;Bot. Not.,1977
4. Revision of the Galápagos endemic genus Lecocarpus (Asteraceae);Adsersen;Bot. Tidsskr.,1980
5. Report on the activities with permanent vegetation quadrats on Sierra Negra November 1985;Adsersen;Mimeographed report to the Charles Darwin Research Station,1986