@article{10_21136_CMJ_1994_128454,
     author = {Jarn{\'\i}k, Ji\v{r}{\'\i} and Kurzweil, Jaroslav},
     title = {Pfeffer integrability does not imply $M_1$-integrability},
     journal = {Czechoslovak Mathematical Journal},
     pages = {47--56},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1994},
     doi = {10.21136/CMJ.1994.128454},
     mrnumber = {1257935},
     zbl = {0810.26009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128454/}
}