Eberhard Herrmann. Orbits of Hyperhypersimple Sets and the Lattice of Sigma:::0:::::3:: Sets. Journal of Symbolic Logic, 48(3):693-699, 1983.
@article{Herrmann83,
title = {Orbits of Hyperhypersimple Sets and the Lattice of Sigma:::0:::::3:: Sets},
author = {Eberhard Herrmann},
year = {1983},
researchr = {https://researchr.org/publication/Herrmann83},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {48},
number = {3},
pages = {693-699},
}