@article{ZNSL_2012_405_a11,
     author = {L. Yu. Kolotilina},
     title = {Upper bounds for the second largest eigenvalue of symmetric nonnegative matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {138--163},
     publisher = {mathdoc},
     volume = {405},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2012_405_a11/}
}