@article{NSJOM_1980_10_Nonea_14,
     author = {Surla Katarina},
     title = {An a posteriori error estimation 

 and acceleration of the nonstationary iterative procedure in a case when an 

 eigenvalue and corresponding eigenelement of the operator are known},
     journal = {Novi Sad Journal of Mathematics},
     pages = {123-136},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_14/}
}