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* {{Citation |first=H. |last=Stephani |year=1989 |title=Differential Equations: Their Solution Using Symmetries. Edited by M. MacCallum |publisher=Cambridge University Press }}.
 
* {{Citation |first=H. |last=Stephani |year=1989 |title=Differential Equations: Their Solution Using Symmetries. Edited by M. MacCallum |publisher=Cambridge University Press }}.
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* {{cite book |title=Partial Differential Equations and Solitary Waves Theory
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* {{cite book |title=Partial Differential Equations and Solitary Waves Theory|first=Abdul-Majid|last=Wazwaz|publisher=Higher Education Press|year=2009|isbn=978-3-642-00251-9|page=}}
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|first=Abdul-Majid|last=Wazwaz|publisher=Higher Education Press|year=2009|isbn=978-3-642-00251-9|page=}}
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|first=Abdul-Majid|last=Wazwaz|publisher=Higher Education Press|year=2009|isbn=978-3-642-00251-9|page=}}
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| first Abdul-Majid | last Wazwaz | publisher Higher Education Press | year 2009 | isbn 978-3-642-00251-9 | page }
      
* {{cite book |title=Partial Differential Equations Methods and Applications|first=Abdul-Majid|last=Wazwaz|publisher=A.A. Balkema|year=2002|isbn=90-5809-369-7|page=}}
 
* {{cite book |title=Partial Differential Equations Methods and Applications|first=Abdul-Majid|last=Wazwaz|publisher=A.A. Balkema|year=2002|isbn=90-5809-369-7|page=}}
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