1. Adams MN (1982) Plant architecture and yield breeding. Iowa State J Res 56:225–254
2. Akinnifesi FK, Leakey RRB, Ajayi OC, Sileshi G, Tchoundjeu Z, Matakala P, Kwesiga FR (eds) (2008) Indigenous fruit trees in the tropics: domestication, utilization and commercialization. CAB International, Wallingford, 438p
3. Beech E, Rivers R, Oldfield S, Smith SP (2017) GlobalTreeSearch. The first complete global database of tree species and country distributions. J Sust For 36:454–489
4. Blair G, Catchpoole D, Horne P (1990) Forage tree legumes: their management and contributions to the nitrogen economy of wet and humid tropical environments. Adv Agron 44:27–54
5. Borlaug NE, Dowswell CR (1988) World revolution in agriculture. 1988 Britannica Book of the Year, Chicago, pp 5–14