@article{10_4064_ap_30_1_9_18,
     author = {N. K. Kundu},
     title = {On some properties of symmetric derivatives},
     journal = {Annales Polonici Mathematici},
     pages = {9--18},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1974},
     doi = {10.4064/ap-30-1-9-18},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-30-1-9-18/}
}