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CONTEMPORARY ENGINEERING SCIENCES ISSN 1313-6569 (print) ISSN 1314-7641 (online) |
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Ilya V. Osipov, Alex A. Volinsky, Evgeny Nikulchev, Dmitry Plokhov Study of monetization as a way of motivating freemium service users Contemporary Engineering Sciences, Vol. 8, 2015, no. 20, 911-918 http://dx.doi.org/10.12988/ces.2015.57212 Copyright © 2015 Ilya V. Osipov, Alex A. Volinsky, Evgeny Nikulchev and Dmitry Plokhov. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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