Decay rates of quarkonia with NRQCD formalism using spectroscopic parameters of potential modelsA. K. Rai, J. N. Pandya and P. C. VinodkumarEur. Phys. J. A, 38 1 (2008) 77-84DOI: https://doi.org/10.1140/epja/i2008-10639-9