@article{10_4064_sm_60_3_239_254,
     author = {Raimond Struble},
     title = {A two-sided operational calculus},
     journal = {Studia Mathematica},
     pages = {239--254},
     publisher = {mathdoc},
     volume = {60},
     number = {3},
     year = {1977},
     doi = {10.4064/sm-60-3-239-254},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-60-3-239-254/}
}