@article{CM_1979__39_2_247_0,
     author = {Kannan, V.},
     title = {Ordinal invariants in topology {II.} {Sequential} order of compactifications},
     journal = {Compositio Mathematica},
     pages = {247--262},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {39},
     number = {2},
     year = {1979},
     mrnumber = {546967},
     zbl = {0416.54019},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1979__39_2_247_0/}
}