@inproceedings { Gutman19900905,
  author = "Gutman A.E.",
  title = "On disjointness preserving operators in spaces of continuous functions",
  booktitle = "XV All-USSR School on the theory of operators in function spaces (Ulyanovsk, September 5--12, 1990): Proceedings",
  address = "Ulyanovsk",
  year = "1990",
  volume = "1",
  pages = "76",
  language = "russian",
  annote = "For a disjointness preserving linear operator acting from a lattice-normed space of continuous vector-valued functions into a space of weakly continuous vector-valued functions the equivalence is established of its $r$-$o$-continuity, $r$-continuity, majorizability, and multiplicativity on principal ideals."
}