@article{KJM_2013_37_2_a1,
     author = {Simona Decu and Leopold Verstraelen},
     title = {A {Note} on the {Isotropical} {Geometry} of {Production} {Surfaces}},
     journal = {Kragujevac Journal of Mathematics},
     pages = {217 },
     year = {2013},
     volume = {37},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/KJM_2013_37_2_a1/}
}