Jespers, Eric <br/><br/>
Group ring groups / 
Eric Jespers and Angel Del Rio 
 - Berlin;  Walter de Gruyter,  2025. 
 - x, 217p.; 
<br/><br/> Gifted by School of Science, IGNOU (NBHM) 
<br/><br/><label>ISBN: </label>9783111700700