Shervatov, V. G. <br/><br/>
Hyperbolic functions 

 - Boston :   D. C. Heath and Company,  1963. 
 - 55p.  : ill.   ; 21cm.  
 - Topics in Mathermatics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Exponential functions
<br/><br/><label>LC Class. No.: </label>MATH QA342.S478