Ammann, Brigitta (1989): Late-Quaternary palynology at Lobsigensee - Regional vegetation history and local lake development. ISBN 978-3-443-64049-1, Dissertationes Botanicae, 137, 157 pp, http://www.schweizerbart.de/publications/detail/isbn/9783443640491/Late-Quaternary-Palynology-at-Lobsigensee