Surface behaviour of the pairing gap in a slab of nuclear matter M. Baldo, M. Farine, U. Lombardo, E. E. Saperstein, P. Schuck and M. V. Zverev Eur. Phys. J. A, 18 1 (2003) 17-23 Published online: 30 September 2003 DOI: 10.1140/epja/i2003-10064-8