Agazzi, Evandro <br/><br/>
La logica simbolica. 

 - 3. ed. 
 - Barcelona  Editorial Herder  1979. 
 - 355 p. 
<br/><br/>Bibliography : p. 331-335. 
<br/><br/><label>ISBN: </label>8425401305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical