General literature - S
Smith N J H, Williams J T, Plucknett D L, Talbot J P (1992) Tropical forests and their crops, Cornell University Press, New York, U.S.A.
Smith N J H (1999) The Amazon river forest: a natural history of plants, animals and people, Oxford University Press, Oxford
Stuessy T F, Horandl E, Mayer V (2001) Plant systematics: a half-century of progress (1950-2000) and future challenges, International Association for Plant Taxonomy, Vienna
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