Nonlinear Analysis: Real World Applications > 2009 > 10 > 4 > 2195-2206
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journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2008.04.004 |
Nonlinear Analysis: Real World Applications > 2009 > 10 > 4 > 2195-2206
journal ISSN : | 1468-1218 |
DOI | 10.1016/j.nonrwa.2008.04.004 |