Bulletin of the British Museum (Natural History) Botany - British Museum (Natural History) (The Museum, 1983)

Bulletin of the British Museum (Natural History) Botany - British Museum (Natural History) (The Museum, 1983)

Bulletin of the British Museum (Natural History) Botany - British Museum (Natural History) (The Museum, 1991)

Bulletin of the British Museum (Natural History) Botany - British Museum (Natural History) (The Museum, 1991)

The naturalist - West-Riding Consolidated Naturalists' Society (Simpkin, Marshall, 1978)

Stuttgarter Beiträge zur Naturkunde Serie A Biologie - Staatliches Museum für Naturkunde in Stuttgart. (Staatliches Museum für Naturkunde, 1994)