@article{SMJ2_2003_29_1_a6,
     author = {Khristov, E.},
     title = {On the {Transformations} of {Symplectic} {Expansions} and the {Respective} {B\"acklund} {Transformation} for the {KDV} {Equation}},
     journal = {Serdica Mathematical Journal},
     pages = {75--94},
     year = {2003},
     volume = {29},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2003_29_1_a6/}
}