@article{AL_1977_16_1_a9,
     author = {Helmut Vogel},
     title = {Partielle abz\"ahlbare und endliche {Funktionale}},
     journal = {Algebra i logika},
     pages = {109--119},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1977},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/AL_1977_16_1_a9/}
}