@article{10_4064_ap_31_3_301_310,
     author = {Shih-Hung Chang},
     title = {On sufficiency of decomposable jets in $J^r(2,1)$},
     journal = {Annales Polonici Mathematici},
     pages = {301--310},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {1975},
     doi = {10.4064/ap-31-3-301-310},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-31-3-301-310/}
}