Sedrakyan, Hayk <br/><br/>
The Stair-step approach in mathematics / 
Hayk Sedrakyan and Nairi Sedrakyan 
 - Cham  Springer-Verlag  2018 
 - xix, 531p 
 - Problem books in mathematics .
<br/><br/><label>ISBN: </label>9783319706313 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Mathematics--Problems, exercises, etc.
<br/><br/><label>Dewey Class. No.: </label>510   / SED