@article{SJL_1967-1968____20_0,
     author = {Ne\v{c}as, Jindrich},
     title = {Sur la r\'egularit\'e des solutions faibles des \'equations elliptiques non-lin\'eaires},
     journal = {S\'eminaire Jean Leray},
     pages = {20--57},
     publisher = {Coll\`ege de France},
     year = {1967-1968},
     language = {fr},
     url = {http://archive.numdam.org/item/SJL_1967-1968____20_0/}
}