@article{VMJ_2008_10_3_a1,
     author = {V. P. Kondakov},
     title = {Simple perturbations of bases in {K\"othe} spaces},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {11--22},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2008_10_3_a1/}
}