•
Tesi, la testudo: Esperanto-Lehrbuch/intensa lernolibro ("Tessie the Turtle"), 1st ed. 1985, revised 3rd ed. 2006, 226 pp., . •
Esperanto-dansk ordbog ("Esperanto-Danish Dictionary"), 2nd ed., 1997, Mnemo, 258 pp., . •
The parsing system Palavras, 1999, Aarhus Univ. Press, 411 pp., . •
Øreakupunktur ("Ear Acupuncture"), 2000, Mnemo, 175 pp., . •
Kinesisk urtemedicin: Teori og praksis ("Chinese Herbal Medicine: Theory and Practice"), 2001, Mnemo, 672 pp., . •
Klassisk akupunktur ("Classic Acupuncture"), 2nd ed., 2002, Mnemo, 848 pp., . •
Grammy i Klostermølleskoven: Tværsproglig sætningsanalyse for begyndere ("Grammy in the
Klostermølle Forest: Cross-Linguistic Sentence Analysis for Beginners"), 2002, Mnemo, 64 pp., . •
Portugisisk-dansk ordbog ("
Portuguese-Danish Dictionary"), 4th ed., 2003, Mnemo, 520 pp., . ==Notes==