@article{10_4064_ap_7_1_1_7,
     author = {Z. Ciesielski},
     title = {Some properties of convex functions of higher orders},
     journal = {Annales Polonici Mathematici},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1959},
     doi = {10.4064/ap-7-1-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-7-1-1-7/}
}