@article{MV_1969_21_4_a5,
     author = {S. K. Chatterjea},
     title = {A remark on operational formula},
     journal = {Matemati\v{c}ki vesnik},
     pages = {385 },
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/MV_1969_21_4_a5/}
}