Hydrocarbons in surface sediments of harbor areas in a tropical region (Ceara state, northeast Brazil) - Buruaem, Lucas Moreira; Taniguchi, Satie; Sasaki, Silvio Tarou; Bícego, Márcia Caruso; Costa-Lotufo, Letícia Veras; Abessa, Denis Moledo de Souza (Environmental Sciences Earth (print), 2016)