What has the author Kjell Sandvik written?

Kjell Ivar Flatberg has written:

'Sphagnum angermanicum og S. molle i Norge' -- subject(s): Mosses, Sphagnum angermanicum, Sphagnum molle

'Studies in Myrica gale L., with main emphasis on its occurrence in the inner parts of the Gauldalen area in central Norway' -- subject(s): Climatic factors, Geographical distribution, Sweet gale

'A new locality of Lophozia marchica in Norway' -- subject(s): Liverworts, Lophozia marchica