Friedman, Harvey. "Minimality in the ${Δ^1}_2$-degrees." Fundamenta Mathematicae 81.3 (1974): 183-192. <http://eudml.org/doc/214636>.
@article{Friedman1974, author = {Friedman, Harvey}, journal = {Fundamenta Mathematicae}, language = {eng}, number = {3}, pages = {183-192}, title = {Minimality in the $\{Δ^1\}_2$-degrees}, url = {http://eudml.org/doc/214636}, volume = {81}, year = {1974}, }
TY - JOUR AU - Friedman, Harvey TI - Minimality in the ${Δ^1}_2$-degrees JO - Fundamenta Mathematicae PY - 1974 VL - 81 IS - 3 SP - 183 EP - 192 LA - eng UR - http://eudml.org/doc/214636 ER -
