@article{MM2_1976__18_154395,
     author = {Ernst Albrecht and Stefan Frunza},
     title = {Non-Analytic {Functional} {Calculi} in {Several} {Variables.}},
     journal = {Manuscripta mathematica},
     pages = {327--336},
     publisher = {mathdoc},
     volume = {18},
     year = {1976},
     zbl = {0341.47011},
     url = {http://geodesic.mathdoc.fr/item/MM2_1976__18_154395/}
}