@article{MZM_2000_67_6_a15,
     author = {V. F. Gaposhkin},
     title = {On the maximal quadratic function for power-bounded operators in~$L^p$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {950--953},
     publisher = {mathdoc},
     volume = {67},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_6_a15/}
}