Richness and diversity of Leguminosae in an altitudinal gradient in the tropical semi-arid zone of Brazil
Jacira R. LIMA,Vidal F. MANSANO, Francisca S. ARAÚJO
J Syst Evol . 2012, (5): 433 -442 .  DOI: 10.1111/j.1759-6831.2012.00190.x