@article{NSJOM_1980_10_Nonea_19,
     author = {Grulovi\'c Milan},
     title = {A comment on forcing},
     journal = {Novi Sad Journal of Mathematics},
     pages = {161-171},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1980_10_Nonea_19/}
}