Jyrki T. J. Penttinen  <br/><br/>
5G simplified:ABCs of advanced mobile communications/ 
Jyrki T. J. Penttinen 
 -  Independently published,  2019. 
 - 168 pages,  
<br/><br/><label>ISBN: </label>9781086032604 
<br/><br/><label>Dewey Class. No.: </label>621.38456