@article{10_21136_CMJ_1993_128404,
     author = {Heinig, Hans P. and Kufner, Alois},
     title = {Weighted {Friedrichs} inequalities in amalgams},
     journal = {Czechoslovak Mathematical Journal},
     pages = {285--308},
     publisher = {mathdoc},
     volume = {43},
     number = {2},
     year = {1993},
     doi = {10.21136/CMJ.1993.128404},
     mrnumber = {1211751},
     zbl = {0788.26012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1993.128404/}
}