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[24 September 2007, http://www.azstarnet.com/sn/hourlyupdate/202820.php, "Iran's president at Columbia University - a transcript", azstarnet.com, 2007-09-25] 
2007
                                    
Great Books: The Foundation of a Liberal Education (1954)
                                        
                                        Columbia University speech, 24 September 2007 
[24 September 2007, http://www.azstarnet.com/sn/hourlyupdate/202820.php, "Iran's president at Columbia University - a transcript", azstarnet.com, 2007-09-25] 
2007
                                    
Putnam as quoted in: Julian Baggini, Jeremy Stangroom (2005) What Philosophers Think. p. 233
Grundlagen der Analysis [Foundations of Analysis] (1930) Preface for the Student, as quoted by Eli Maor, Trigonometric Delights (2013)
as translated by Arnold Dresden from: Brouwer, L. E. J. (1913). Intuitionism and formalism. Bulletin of the American Mathematical Society, 20(2), 81–96. (quote on p. 84)
                                        
                                         Set theory and the continuum hypothesis, p. 8. https://books.google.com/books?id=Z4NCAwAAQBAJ&pg=PA8 
Set Theory and the Continuum Hypothesis (1966)
                                    
Source: Jacques Lipchitz: The Artist at Work, 1966, p. 199
 
                            
                        
                        
                         
                            
                        
                        
                         
                            
                        
                        
                        