@article{VUU_2022_32_3_a3,
     author = {N. Ege and A. Huseyin and N. Huseyin},
     title = {Upper and lower directional derivative sets and differentials of the set valued maps},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {403--414},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VUU_2022_32_3_a3/}
}