@article{10_4171_dm_390,
     author = {Adrian Langer and H\'el\`ene Esnault},
     title = {On a positive equicharacteristic variant of the $p$-curvature conjecture},
     journal = {Documenta mathematica},
     pages = {23--50},
     year = {2013},
     volume = {18},
     doi = {10.4171/dm/390},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/390/}
}