1. At that time, he was working on MSS 172, 173, and 174 and started MS 175. In November, by invitation of his doctor, Dr Bevan, Wittgenstein moved to his house in Cambridge;R Rhees;February, Wittgenstein continued working on MS 135 and started MS 116 on 21 March. e manuscripts from MS 172 to 177 were later, for the most part, published. Part I of the Remarks on Colours, published in Oxford in 1977, came from manuscript MS 176, Part II from MS 172, and Part III from MS 173. In the volume entitled On Certainty,1950
2. Collected Works 1;L E J Brouwer;Philosophy and Foundations of Mathematics,1975
3. Life, Art and Mysticism;L E J Brouwer;Notre Dame Journal of Formal Logic,1996