Villemson, Jan Size-efficient interval time stamps - Tartu : Tartu Univ. Press, 2002. - 81 p. : ill. - Diss.Math. Univ. Tartuensis 29 . - 517.926.225 . Bibliogr.: p. 69-72 ISBN: 9985-56-651-3 Subjects--Topical Terms: Mathematics Universal Decimal Class. No.: 517.926.225