The effect of the neutron-proton pairing interaction on the excited 0+ states in some deformed nuclei of the rare-earth regionM. Gerçeklioǧlu, A. A. Kuliev and H. H. ErbilEurophys. Lett., 47 1 (1999) 25-29DOI: https://doi.org/10.1209/epl/i1999-00345-2