Johansen, Peter. <br/><br/>
An algebraic normal form for regular envents 

 - Lyngby :   Polyteknisk Forlag,   1972. 
 - 164 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ALGEBRA<br/>TEORIA DE GRUPOS
<br/><br/><label>Universal Decimal Class. No.: </label>519.61