@article{CMFD_2004_12_a0,
     author = {B. M. Darinskii and Yu. I. Sapronov and S. L. Tsarev},
     title = {Bifurcations of extremals of {Fredholm} functionals},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {3--140},
     publisher = {mathdoc},
     volume = {12},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2004_12_a0/}
}