@article{10_4153_CMB_2010_099_3,
     author = {Dow, Alan},
     title = {Sequential {Order} under {PFA}},
     journal = {Canadian mathematical bulletin},
     pages = {270--276},
     year = {2011},
     volume = {54},
     number = {2},
     doi = {10.4153/CMB-2010-099-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2010-099-3/}
}