@article{10_5817_AM2021_4_195,
     author = {Delladio, Silvano},
     title = {Involutivity degree of a distribution at superdensity points of its tangencies},
     journal = {Archivum mathematicum},
     pages = {195--219},
     publisher = {mathdoc},
     volume = {57},
     number = {4},
     year = {2021},
     doi = {10.5817/AM2021-4-195},
     mrnumber = {4346111},
     zbl = {07442412},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5817/AM2021-4-195/}
}