@article{SM_1999_190_5_a0,
     author = {A. I. Aptekarev},
     title = {Strong asymptotics of multiply orthogonal polynomials for {Nikishin} systems},
     journal = {Sbornik. Mathematics},
     pages = {631--669},
     publisher = {mathdoc},
     volume = {190},
     number = {5},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1999_190_5_a0/}
}