@article{PIM_1989_N_S_46_60_a16,
     author = {I. E. Sharkawi},
     title = {The {Formal} {Solution} of {Mikusinski} {Operational} {Differential} {Equations} {With} {Variable} {Coefficients}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {113 },
     publisher = {mathdoc},
     volume = {_N_S_46},
     number = {60},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a16/}
}