@misc{Seda_N._Manukian_On,
 author={Seda N. Manukian},
 howpublished={online},
 publisher={Изд-во НАН РА},
 abstract={The notion of positive arithmetical formula in the signature (0,=, S), where S(x) = x +1, is defined and investigated in [1] and [2] . A multidimensional arithmetical set is said to be positive if it is determined by a positive formula. Some subclass of the class of positive sets, namely, the class of strongly positive sets, is considered.},
 title={On Strongly Positive Multidimensional Arithmetical Sets},
 type={Հոդված},
 keywords={Mathematics, Algebra},
}