Published in The Oxford Companion to Philosophy (01.01.2005)

by Landini, Gregory
Published in History and philosophy of logic (01.11.2013)

by Biletzki, Anat, Matar, Anat
Year of Publication 1998

by Findlay, J.N.
Published in Wittgenstein (1984)

by Nelson, R.J.
Year of Publication 1992