@article{SF_1985__32_134773,
     author = {Ch.Y. Lin and S.Y. Shaw},
     title = {On product formulas for exponential functions.},
     journal = {Semigroup forum},
     pages = {127--134},
     publisher = {mathdoc},
     volume = {32},
     year = {1985},
     zbl = {0573.47037},
     url = {http://geodesic.mathdoc.fr/item/SF_1985__32_134773/}
}