Konyndyk, Kenneth.
Introductory modal logic /
Kenneth Konyndyk 
. - Notre Dame : University of Notre Dame Press,  1986 
. - x, 133 p.  tab., schem.  23 cm. 
<br/>К.: Бібліогр. : c. 131-133 
<br/><label>  ISBN: </label>0-268-01159-1