@article{10_4153_CJM_1993_050_7,
     author = {Poliquin, R. A. and Rockafellar, R. T.},
     title = {A {Calculus} of {EPI-Derivatives} {Applicable} to {Optimization}},
     journal = {Canadian journal of mathematics},
     pages = {879--896},
     year = {1993},
     volume = {45},
     number = {4},
     doi = {10.4153/CJM-1993-050-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-050-7/}
}