@article{MM2_1969__1_153986,
     author = {Manfred Kracht and Erwin Kreyszig},
     title = {Bergman-Operatoren mit {Polynomen} als {Erzeugenden.}},
     journal = {Manuscripta mathematica},
     pages = {369--376},
     publisher = {mathdoc},
     volume = {1},
     year = {1969},
     zbl = {0181.37701},
     url = {http://geodesic.mathdoc.fr/item/MM2_1969__1_153986/}
}