@article{MZM_2009_85_2_a4,
     author = {R. S. Makin},
     title = {On {Eigenvalues} for {Some} {Classes} of {Positive} {Operators}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {214--226},
     publisher = {mathdoc},
     volume = {85},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_2_a4/}
}