Template:Christensen, 1992

• Christensen, K.I. 1992. Revision of Crataegus sect. Crataegus and nothosect. Crataeguineae (Rosaceae-Maloideae) in the Old World. Systematic Botany Monographs 35: 1–199. JSTOR PDF:  
  • Find all Wikispecies pages which cite this reference.