@article{COMIM_2016__24_2_a1,
     author = {Massa, Enrico and Pagani, Enrico},
     title = {On the notion of {Jacobi} fields in constrained calculus of variations},
     journal = {Communications in Mathematics},
     pages = {91--113},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {2016},
     mrnumber = {3590208},
     zbl = {1364.49022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2016__24_2_a1/}
}