Wisdom's Wittgenstein
N. Milkov, in: A.H. Khani , G. Kemp  (Eds.), Wittgenstein and Other Philosophers: His Influence on Historical and Contemporary Analytic Philosophers, 2 Vol., Volume II, 1st ed., Routledge, London, n.d.

Stebbing's Wittgenstein
N. Milkov, in: A.H. Khani , G. Kemp  (Eds.), Wittgenstein and Other Philosophers: His Influence on Historical and Contemporary Analytic Philosophers, Vol. II, 1st ed., Routledge, London, n.d.

John Wisdom (1904-1993)
N. Milkov, in: J. Fieser , B. Dowden (Eds.), Internet Encyclopedia of Philosophy, 2019.