Ganchev, Hristo, and Andrey C. Sariev. “DEFINABILITY OF JUMP CLASSES IN THE LOCAL THEORY OF THE $\omega$-ENUMERATION DEGREES”. Ann. Sofia Univ. Fac. Math. and Inf. 102 (December 12, 2015): 207–224. Accessed November 23, 2024. https://ftl5.uni-sofia.bg/index.php/fmi/article/view/70.