Notturno, Mark Amadeus <br/><br/>
Objectivity, rationality and the third realm :  justification and the grounds of psychologism :  a study of Frege and Popper / 
Mark Amadeus Notturno 
 - Dordrecht :  Martinus Nijhoff Pub.,  1985 
 - 251 p. ;  25 cm. 
 - Nijhoff international philosophy series  v. 16 .
<br/><br/>p. 225-231. 
<br/><br/><label>ISBN: </label>9024729564 
<br/><br/><label>Subjects--Personal Names: </label><br/>Frege, Gottlob, 1848--1925<br/>Popper, Karl Raimund, Sir, 1902