@article{10_4064_cm_60_61_1_261_273,
     author = {Victor L. Shapiro},
     title = {One-sided conditions for quasilinear {Jacobi} differential equations},
     journal = {Colloquium Mathematicum},
     pages = {261--273},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {1990},
     doi = {10.4064/cm-60-61-1-261-273},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-1-261-273/}
}