@article{NSJOM_1979_9_Nonea_19,
     author = {Vojvodi\'c Gradimir},
     title = {On 

 the {{\textquotedblleft}O} e theorem for mixed-valued 

 predicate calculi},
     journal = {Novi Sad Journal of Mathematics},
     pages = {127-131},
     publisher = {mathdoc},
     volume = {9},
     year = {1979},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1979_9_Nonea_19/}
}