BioStor
 | The genera of Juglandaceae in the southeastern United States T S Elias (1972) Journal of the Arnold Arboretum 53: 26-51 |
 | The Classification Within the Juglandaceae Wayne E Manning (1978) Annals of the Missouri Botanical Garden 65: 1058-1087 |
 | The Metasequoia flora and its phytogeographic significance S Y Hu (1980) Journal of the Arnold Arboretum 61: 41-94 |