@article{Chentsov_1997 author = {Alexander G. Chentsov and O. A. Cherepanova}, title = {Relaxations of Attainable Sets and Their Generalized Representation in the Class of Two-Valued Finitely Additive Measures}, journal = {Journal of Automation and Information Sciences}, issn = {1064-2315}, year = {1997}, volume = {29}, number = {1}, pages = {23--31} }