Nonlinear Analysis: Real World Applications > 2011 > 12 > 4 > 2408-2415
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journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2011.02.015 |
Nonlinear Analysis: Real World Applications > 2011 > 12 > 4 > 2408-2415
journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2011.02.015 |