@article{MZM_2016_100_3_a1,
     author = {C. Valero},
     title = {Maxwell's {Equations,} the {Euler} {Index,} and {Morse} {Theory}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {331--343},
     publisher = {mathdoc},
     volume = {100},
     number = {3},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2016_100_3_a1/}
}