@article{SM_2011_202_9_a2,
     author = {D. P. Il'yutko},
     title = {Framed $4$-graphs: {Euler} tours, {Gauss} circuits and rotating circuits},
     journal = {Sbornik. Mathematics},
     pages = {1303--1326},
     publisher = {mathdoc},
     volume = {202},
     number = {9},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2011_202_9_a2/}
}