@article{10_21136_CMJ_1995_128534,
     author = {Pt\'ak, Vlastimil},
     title = {Generalized couplings},
     journal = {Czechoslovak Mathematical Journal},
     pages = {517--528},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1995},
     doi = {10.21136/CMJ.1995.128534},
     mrnumber = {1344518},
     zbl = {0845.47036},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1995.128534/}
}