Surface behaviour of the pairing gap in a slab of nuclear matterM. Baldo, M. Farine, U. Lombardo, E. E. Saperstein, P. Schuck and M. V. ZverevEur. Phys. J. A, 18 1 (2003) 17-23DOI: https://doi.org/10.1140/epja/i2003-10064-8