1. A. S. Kechris, AD and projective ordinals, this volume.
2. A. S. Kechris and D. A. Martin, On the theory of π
3
1
sets of reals, Bull. Amer. Math. Soc., 84 (1978), 149–151.
3. K. Kunen, On
$$\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle\thicksim}$}}{\delta } _5^1$$
, mimeographed notes, August 1971.
4. Y. N. Moschovakis, Determinacy and prewellorderings of the continuum, Math. Logic and Foundations of set theory, Ed. by Y. Bar Hillel, North Holland, Amsterdam-London, 1970, 24–62.