@article{SM_1980_37_2_a6,
     author = {T. I. Akhobadze},
     title = {Functions of bounded generalized second variation},
     journal = {Sbornik. Mathematics},
     pages = {261--294},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1980_37_2_a6/}
}