@article{RSMUP_1984__72__343_0,
     author = {Stingl, Volker},
     title = {Radikale und koradikale {Regeln}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {343--355},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {72},
     year = {1984},
     mrnumber = {778350},
     zbl = {0562.20017},
     language = {de},
     url = {http://www.numdam.org/item/RSMUP_1984__72__343_0/}
}