@article{Abdullayeva_2008 author = {Fargana Abdullayeva}, title = {On One Model of Access Differentiation to Resources of Information System "Population and Migration" by using Petri Nets}, journal = {Journal of Automation and Information Sciences}, issn = {1064-2315}, year = {2008}, volume = {40}, number = {9}, pages = {76--79} }