@article{NSJOM_2010_40_2a_19,
     author = {Dragica Radovanovi\'c},
     title = {Weighted tree automata
 over strong bimonoids},
     journal = {Novi Sad Journal of Mathematics},
     pages = {89-108},
     year = {2010},
     volume = {40},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2010_40_2a_19/}
}