Ibragimov Nail H Ed. 
Lectures on the theory of group properties of differential equations. 
Ibragimov Nail H Ed. 
 - Chennai  World Scientific        2013 
 - xii,141p  cm. 
 2461.6399999999999 
119093 
 2102, 21/08/2013, Ashutosh Technical Books  Textual 
Mathematics
B33, Q3