@article{10_4064_ap_42_1_297_300,
     author = {S. Rolewicz},
     title = {On sufficient conditions of optimality of second order},
     journal = {Annales Polonici Mathematici},
     pages = {297--300},
     publisher = {mathdoc},
     volume = {42},
     number = {1},
     year = {1983},
     doi = {10.4064/ap-42-1-297-300},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-42-1-297-300/}
}