Topoisomerase expression in oral squamous cell carcinoma: relationship with cancer stem cells profiles and lymph node metastasis - Costa, João Paulo Oliveira da; Oliveira, Lucinei Roberto de; Silveira, Giórgia Gobbi da; Soave, Danilo Figueiredo; Soares, Fernando Augusto; Ribeiro-Silva, Alfredo (Journal of Oral Pathology & Medicine, 2012)