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Author: Barrera, A.H.
Source: Information Processing Letters, Volume 59, Number 5, 9 September 1996, pp. 261-265(5)
Document Type: Research Article
Affiliations: Department of Mathematics, Faculty of Science, Hiroshima University, Kagamiyama, Higash-Hiroshima-City, 739, Japan
Publication date: September 9, 1996