@article{AFST_1993_6_2_2_163_0,
     author = {Bernard Dacorogna and Hideyuki Koshigoe},
     title = {On the different notions of convexity for rotationally invariant functions},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {163--184},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 6, 2},
     number = {2},
     year = {1993},
     zbl = {0828.49016},
     mrnumber = {1253387},
     language = {en},
     url = {https://afst.centre-mersenne.org/item/AFST_1993_6_2_2_163_0/}
}