@article{FPM_1998_4_2_a20,
     author = {M. M. Grinenko},
     title = {Normal surfaces whose anticanonical divisor is numerically positive},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {757--761},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1998_4_2_a20/}
}