Levi, D., ed. <br/><br/>
Symmetries and nonlinear phenomena :  proceedings of the International School on Applied Mathematics, Paipa (Colombia), Feb. 22-26, 1988 / 
editors, D. Levi, P. Winternitz. 
 - Singapore ;  World Scientific,  c1988. 
 - xi, 458 p. :  ill. ;  23 cm. 
 - CIF series;  v 9. .
<br/><br/><label>ISBN: </label>9971506637 
<br/><br/><label>Subjects--Index Terms: </label>Nonlinear theories--Congresses  Group theory--Congresses  Symmetry (Physics)--Congresses  Mathematical physics--Congresses 
<br/><br/><label>Dewey Class. No.: </label>530.1/5  / LEV