@article{10_4064_fm_151_3_279_297,
     author = {Nobuyuki Kemoto and Tsugunori  Nogura and Kerry D. Smith and Yukinobu  Yajima},
     title = {Normal subspaces in products of two ordinals},
     journal = {Fundamenta Mathematicae},
     pages = {279--297},
     year = {1996},
     volume = {151},
     number = {3},
     doi = {10.4064/fm-151-3-279-297},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-151-3-279-297/}
}