@article{10_21136_CMJ_1992_128370,
     author = {Duda, Jarom{\'\i}r},
     title = {Coherence and weak coherence in the square of algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {613--618},
     publisher = {mathdoc},
     volume = {42},
     number = {4},
     year = {1992},
     doi = {10.21136/CMJ.1992.128370},
     mrnumber = {1182192},
     zbl = {0777.08005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128370/}
}