Douglas A. Cenzer, Rodney G. Downey, Carl G. Jockusch Jr., Richard A. Shore. Countable Thin Pi:::0:::::1:: Classes. Annals of Pure and Applied Logic, 59(2):79-139, 1993.
@article{CenzerDJS93, title = {Countable Thin Pi:::0:::::1:: Classes}, author = {Douglas A. Cenzer and Rodney G. Downey and Carl G. Jockusch Jr. and Richard A. Shore}, year = {1993}, researchr = {https://researchr.org/publication/CenzerDJS93}, cites = {0}, citedby = {0}, journal = {Annals of Pure and Applied Logic}, volume = {59}, number = {2}, pages = {79-139}, }