@article{IVM_2006_3_a0,
     author = {M. M. Arslanov and N. Kehayopulu},
     title = {Weak presentations of computable partially ordered semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--8},
     publisher = {mathdoc},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2006_3_a0/}
}