@article{NSJOM_2005_35_2a_3,
     author = {F. Vajzovi\'c and A. \v{S}ahovi\'c},
     title = {Cosine operator functions and 

 {Hilbert} transforms},
     journal = {Novi Sad Journal of Mathematics},
     pages = {41-55},
     publisher = {mathdoc},
     volume = {35},
     number = {2},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2005_35_2a_3/}
}