@article{10_4064_ap_2_2_294_313,
     author = {Zofia Szmydt},
     title = {On the degree of regularity of surfaces formed by the asymptotic integrals of differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {294--313},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1955},
     doi = {10.4064/ap-2-2-294-313},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-2-2-294-313/}
}