1.
- Lyme neuroborreliosis: improvements of the laboratory diagnosis and a survey of epidemiological and clinical features in Denmark 1985-1990 / Klaus Hansen. 1994. Vol. 89, Suppl. No. 151 - Copenhagen : Munksgaard, 1994 - 44 s.(Acta Neurologica Scandinavica; Suppl. No. 151) ISBN 87-16-15076-7 [1, currently available 0, at library only 1]
- Chapters, articles