@article{10_4064_ap_53_3_267_283,
     author = {Piotr Besala},
     title = {Observations on quasi-linear partial differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {267--283},
     publisher = {mathdoc},
     volume = {53},
     number = {3},
     year = {1991},
     doi = {10.4064/ap-53-3-267-283},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-53-3-267-283/}
}