Nonlinear Analysis: Real World Applications > 2008 > 9 > 4 > 1535-1557
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journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2007.03.018 |
Nonlinear Analysis: Real World Applications > 2008 > 9 > 4 > 1535-1557
journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2007.03.018 |