@article{NSJOM_1981_11_Nonea_13,
     author = {Surla 

 Katarina},
     title = {On 

 alternative nonstationary iterative procedures},
     journal = {Novi Sad Journal of Mathematics},
     pages = {135-148},
     year = {1981},
     volume = {11},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1981_11_Nonea_13/}
}