@article{ZNSL_2012_406_a2,
     author = {D. V. Karpov},
     title = {Spanning trees with many leaves: new lower bounds in terms of number of vertices of degree~3 and at least~4},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {31--66},
     publisher = {mathdoc},
     volume = {406},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2012_406_a2/}
}