Raimundo, J., Pereira, P., Vale, C., & Caetano, M. (2005). Fe, Zn, Cu and Cd concentrations in the digestive gland and muscle tissues of Octopus vulgaris and Sepia officinalis from two coastal areas in Portugal. Ciencias Marinas, 31(1B), 243–251. https://doi.org/10.7773/cm.v31i12.91