B. Ollgaard

Assessment of patient performance of the HandiHaler compared with the metered dose inhaler four weeks after instruction.

V. Backer, R. Dahl, S. Kesten, 2003, Respiratory medicine.

Flow cytometry confirms reticulate evolution and reveals triploidy in Central European Diphasiastrum taxa (Lycopodiaceae, Lycophyta).

J. Fuchs, M. Schnittler, R. Viane, 2011, Annals of botany.

Neotropical Lycopodiaceae-An Overview

B. Ollgaard, 1992 .

A revised classification of the lycopodiaceae sensu lato

B. Ollgaard, 1987 .

A note on some morphological terms of the leaf in the Gleicheniaceae

B. Ollgaard, E. Andersen, 1996 .

Studies in Lycopodiaceae, II. The Branching Patterns and Infrageneric Groups of Lycopodium sensu lato

B. Ollgaard, 1979 .