Grasser, H. S. P. <br/><br/>
A monograph on the general theory of second order parameter-invariant problems in the calculus of variations. 

 - Pretoria :  University of South Africa,  1967. 
 - Mathematical communications of the University of South Africa ;  M2 .
 - University of South Africa. Mathematical communications ;  University of South Africa. Mathematical communications ;  M2. .
<br/><br/>Bibliography: p. [77]-86. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus of variations.