The σK coupling in the chiral unitary approach and the isoscalar ¯N , ¯A interaction A. Martínez Torres, K. P. Khemchandani and E. Oset Eur. Phys. J. A, 36 2 (2008) 211-218 Published online: 02 May 2008 DOI: 10.1140/epja/i2007-10574-3