Ultrastructural evaluation of gingival glycosaminoglycans in ovariectomized rats: effects of steroid hormone therapy - Calió, Pedro Luiz; Simões, Ricardo Ramos; Oliveira Filho, Ricardo Martins; Maciel, Gustavo Arantes Rosa; Simões, Manuel de Jesus; Baracat, Edmund Chada; Soares Junior, José Maria (Gynecologic and obstetric investigation, 2008)