1. Latitudinal gradient of taxonomic richness: combined outcome of temperature and geographic mid-domains effects?
2. Biogeography of Triassic Ammonoids
3. A new Middle Anisian (Middle Triassic) Ammonoid Zone from Northwestern Nevada (USA);Bucher H.;Eclogae Geologicae Helvetiae,1988
4. Ammonoids of the Hyatti Zone and the Anisian transgression in the Triassic Star Peak Group, Northwestern Nevada, USA;Bucher H.;Palaeontographica Abteilung A,1992
5. Ammonoids of the Shoshonensis Zone (Middle Anisian, Middle Triassic) from Northwestern Nevada (USA);Bucher H.;Jahrbuch der Geologischen Bundesanstalt,1992