@article{10_4064_ap_22_1_1_18,
     author = {W. Mlak and E. Schechter},
     title = {On the {Chaplighin} method for partial differential equations of the first order},
     journal = {Annales Polonici Mathematici},
     pages = {1--18},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1969},
     doi = {10.4064/ap-22-1-1-18},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-22-1-1-18/}
}