@article{SM_2006_197_5_a2,
     author = {D. P. Il'yutko},
     title = {Branching extremals of the functional of $\lambda$-normed length},
     journal = {Sbornik. Mathematics},
     pages = {705--726},
     publisher = {mathdoc},
     volume = {197},
     number = {5},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2006_197_5_a2/}
}