TY - JOUR T1 - A quantitative method to establish the clinical evolution of HIV infected patients and the reproductive biology of an echinoid species from Brazil JO - Anais da Academia Brasileira de Ciências A1 - Kellner, Alexander W. A. SN - 0001-3765 UL - 10.1590/S0001-37652009000100001 VL - 81 Y1 - 2009 PB - Brasil ER -