@article{10_4064_ba180529_14_3,
     author = {Arthur W. Apter},
     title = {The consistency of level by level equivalence with $V = {\rm HOD}$, the {Ground} {Axiom,} and instances of square and diamond},
     journal = {Bulletin of the Polish Academy of Sciences. Mathematics},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2020},
     doi = {10.4064/ba180529-14-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ba180529-14-3/}
}