@article{SM_1986_54_2_a13,
     author = {K. Yu. Osipenko},
     title = {Heins' problem and optimal extrapolation of analytic functions prescribed with an error},
     journal = {Sbornik. Mathematics},
     pages = {551--559},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1986_54_2_a13/}
}