Vargas-Yáñez, M., Garivier, F., Pirra, O., & García-Martínez, M. (2005). Using routine hydrographic sections for estimating the parameters needed for Optimal Statistical Interpolation. Application to the northern Alboran Sea. Scientia Marina, 69(4), 435–449. https://doi.org/10.3989/scimar.2005.69n4435