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- [13] sigma-Ideals and Generalized Derivations in sigma-Prime Rings BOLETIM SOCIEDADE PARANAENSE DE MATEMATICA, 2013, 31 (02): : 113 - 119
- [19] TREES AND PI(1)1-SUBSETS OF (OMEGA-1)OMEGA-1 JOURNAL OF SYMBOLIC LOGIC, 1993, 58 (03) : 1052 - 1070