Comparative study of thermal structure, heat content and stability during the winter in three lakes of the Rio Doce Valley (Minas Gerais, Brazil) - Henry, R; Tundisi, José Galizia; Calijuri, Maria do Carmo; Matsumura-Tundisi, T; Rocha, O; Ibanez, M S R (Limnological Studies in Rio Doce Valley Lakes Brazil, 1989)