Berg, Imme van den. <br/><br/>
Nonstandard asymptotic analysis / 
Imme van den Berg. 
 - Berlin :  Springer -Verlag,  1987. 
 - ix, 187 p. :  ill. 
 - Lecture notes in mathematics, no.1249.  .
 - Lecture notes in mathematics (Springer- Verlag),   no.1249. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asymptotic expansions.<br/>Differential equations-Asymptotic theory.