Keyword: Other: others.

HrSh:147
Harrington+Shelah, The undecidability of the recursively enumerable degrees -- American Math Soc Bulletin. New Series 6 (1982) 79-80
FdSh:149
Friedman+Shelah, Tall $\alpha $-recursive structures -- Proc American Math Soc 88 (1983) 672-678
LrMaSh:965 2010-05-14 [pdf] [ps] [abstract]
Larson+Matteo+Shelah, Majority decisions when abstention is possible -- Discrete Math 312 (2012) 1336-1352