@article{MS2_1969__24_166092,
     author = {Fred J. Sansone},
     title = {The {Backward} and {Forward} {Summation} of {Infinite} {Series} of {Isols.}},
     journal = {Mathematica Scandinavica},
     pages = {217--220},
     publisher = {mathdoc},
     volume = {24},
     year = {1969},
     zbl = {0211.01902},
     url = {http://geodesic.mathdoc.fr/item/MS2_1969__24_166092/}
}