@article{MZM_2000_67_5_a12,
     author = {Yu. I. Sapronov and S. L. Tsarev},
     title = {Global comparison of finite-dimensional reduction schemes in smooth variational problems},
     journal = {Matemati\v{c}eskie zametki},
     pages = {745--754},
     publisher = {mathdoc},
     volume = {67},
     number = {5},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_5_a12/}
}