फलकम्:MacTutor Biography
O'Connor, John J.; Robertson, Edmund F.. "MacTutor Biography". MacTutor History of Mathematics archive. University of St Andrews..
फलकम् दस्तावेजीकरण[निर्मियताम्] [purge]
O'Connor, John J.; Robertson, Edmund F.. "MacTutor Biography". MacTutor History of Mathematics archive. University of St Andrews. .