1. Palynological study of a Holocene peat and a Miocene coal deposit from NW Borneo;Anderson;Rev. Palaeobot. Palynol.,1975
2. The fern genus Acrostichum in the Eocene Clarno Formation of Oregon;Arnold;Contrib. Mus. Paleontol. Univ. Mich.,1963
3. A fossil dennstaedtioid fern from the Eocene Clarno Formation of Oregon;Arnold;Contrib. Mus. Paleontol. Univ. Mich.,1964
4. Palynologie und palynostratigraphie des Neogens der Niederrheinischen bucht. Teil 1 Sporen;Ashraf;Palaeontographica B,1995
5. Occurrence of Acrostichum Linn., a coastal fern in the Tertiary sediments of Kasauli, Himachal Pradesh, north-west Himalaya;Awasthi;Palaeobotanist,1996