@article{JRAM_1991__421_153369,
     author = {W. M\"uller and F. Halter-Koch},
     title = {Quantitative aspects of non-unique factorization: {A} general theory with applications to algebraic function fields.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {159--188},
     publisher = {mathdoc},
     volume = {421},
     year = {1991},
     zbl = {0736.11064},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__421_153369/}
}