1. Contribution to the palynosystematics of some genera of the tribe Centaureinae of in Asteraceae;Avetisjan,1964
2. Leitfaden der Pollen bestimmung;Beug,1961
3. Leitfaden der Pollenbestimmung für Mitteleuropa und angrenznde Gebiete;Beug,2004
4. Past and Present Vegetation of the Isle of Skye: a Palaeoecological Study;Birks,1973
5. The apertures of Lactuceae (Compositae) pollen;Blackmore;Pollen Spores,1982