@article{ISU_2012_12_1_a0,
     author = {T. V. Apraksina and M. Yu. Maksimovskiy},
     title = {Acts and partial acts over semilattices},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {3--7},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2012_12_1_a0/}
}