The σK coupling in the chiral unitary approach and the isoscalar ¯N , ¯A interactionA. Martínez Torres, K. P. Khemchandani and E. OsetEur. Phys. J. A, 36 2 (2008) 211-218DOI: https://doi.org/10.1140/epja/i2007-10574-3