Gaines, Robert E <br/><br/>
Concidence degree, and nonlinear differential equations 
Robert E Gaines and Jean L Mawhin 
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 - Springer-Verlag, Berlin  1977 
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 - Lecture Notes in Mathematics, No.0568 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lecture Notes in Mathematics
<br/><br/><label>Dewey Class. No.: </label>R  LNM.0568