@article{VMP_2012_13_4_a8,
     author = {M. S. Ageev},
     title = {Improving document ranking based on logs of search engine users},
     journal = {Numerical methods and programming},
     pages = {559--571},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2012_13_4_a8/}
}