Axial compressive strength of human vertebrae trabecular bones classified as normal, osteopenic and osteoporotic by quantitative ultrasonometry of calcaneus - Cesar, Reinaldo; Leivas, Tomaz Puga; Pereira, César Augusto Martins; Boffa, Ricardo Simionato; Guarniero, Roberto; Reiff, Rodrigo Bezerra de Menezes; Mandeli Netto, Antonio; Fortulan, Carlos Alberto; Rollo, João Manuel Domingos de Almeida (Research on Biomedical Engineering, 2017)