@article{1183742502, author = {Velleman, Dan}, title = {Gap-2 Morasses of Height $\omega$}, journal = {J. Symbolic Logic}, volume = {52}, number = {1}, year = {1987}, pages = { 928-938}, language = {en}, url = {http://dml.mathdoc.fr/item/1183742502} }
Velleman, Dan. Gap-2 Morasses of Height $\omega$. J. Symbolic Logic, Tome 52 (1987) no. 1, pp. 928-938. http://gdmltest.u-ga.fr/item/1183742502/