@article{10_14708_am_v14i1_6418,
     author = {Egor Mikhailovich Bogatov},
     title = {On the history of variational methods of non-linear equations investigations and the contribution of {Soviet} scientists (1920s-1950s).},
     journal = {Antiquitates Mathematicae},
     pages = { 3--38},
     publisher = {mathdoc},
     volume = {14},
     year = {2020},
     doi = {10.14708/am.v14i1.6418},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/am.v14i1.6418/}
}