1. Late-Glacial radiocarbon and palynostratigraphy on the Swiss Plateau;Ammann;Boreas,1989
2. The Würmian Late-glacial in lowland Switzerland;Ammann;J. Quat. Sci.,1994
3. Vegetation responses to rapid warming and to minor climatic fluctuations during the Late-Glacial Interstadial (GI-1) at Gerzensee (Switzerland);Ammann;Palaeogeogr. Palaeoclimatol. Palaeoecol.,2013
4. Atlas of Seeds and Small Fruits of Northwest-European Plant Species with Morphological Descriptions. Part 4;Anderberg,1994
5. Zadenatlas der Nederlandse Flora: ten behoeve van de botanie, palaeontologie, bodemcultuur en warenkennis;Beijerinck,1976