@article{10_4064_fm215_2_2,
     author = {Hiroshi Sakai},
     title = {Partial square at $\omega _1$ is implied by {MM
} but not by {PFA}},
     journal = {Fundamenta Mathematicae},
     pages = {109--131},
     publisher = {mathdoc},
     volume = {215},
     number = {2},
     year = {2011},
     doi = {10.4064/fm215-2-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm215-2-2/}
}