@article{10_21136_AM_1966_102996,
     author = {Liebl, Petr and Sedl\'a\v{c}ek, Ji\v{r}{\'\i}},
     title = {Umformung von {Quadratmatrizen} auf quasitriangul\"are {Form} mit {Mitteln} der {Graphentheorie}},
     journal = {Applications of Mathematics},
     pages = {1--9},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1966},
     doi = {10.21136/AM.1966.102996},
     mrnumber = {0195873},
     zbl = {0171.13403},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1966.102996/}
}