@article{DAN_1986_289_1_a15,
     author = {E. I. Ryzhak},
     title = {Kink folds as a localization of bending. {The} simplest model},
     journal = {Doklady Akademii Nauk},
     pages = {67--71},
     publisher = {mathdoc},
     volume = {289},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_289_1_a15/}
}