@article{KJM_2014_38_1_a1,
     author = {Bang-Yen Chen and Simona Decu and Leopold Verstraelen},
     title = {Notes on {Isotropic} {Geometry} of {Production} {Models}},
     journal = {Kragujevac Journal of Mathematics},
     pages = {23 },
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2014_38_1_a1/}
}