@misc{Grover_Charles_Alfred_(1890–_)_Hyperbolic_1948,
 author={Grover, Charles Alfred (1890– )},
 copyright={Rights Reserved - Restricted Access},
 address={Manchester},
 howpublished={online},
 year={1948},
 publisher={Classifax Publications},
 language={eng},
 type={Text},
 title={Hyperbolic functions : their derivation and applications in vector algebra},
}