| Title: | A remark on a problem of Harary (English) | 
| Author: | Chvátal, Václav | 
| Language: | English | 
| Journal: | Czechoslovak Mathematical Journal | 
| ISSN: | 0011-4642 (print) | 
| ISSN: | 1572-9141 (online) | 
| Volume: | 20 | 
| Issue: | 1 | 
| Year: | 1970 | 
| Pages: | 109-111 | 
| Summary lang: | English | 
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| Category: | math | 
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| MSC: | 05.40 | 
| idZBL: | Zbl 0197.50203 | 
| idMR: | MR0266791 | 
| DOI: | 10.21136/CMJ.1970.100949 | 
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| Date available: | 2008-06-09T13:45:38Z | 
| Last updated: | 2020-07-28 | 
| Stable URL: | http://hdl.handle.net/10338.dmlcz/100949 | 
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| Reference: | [1] F. Harary: Problem 16.p. 161, Theory of Graphs and Its Applications, edited by M. Fiedler, Czechoslovak Academy of Sciences, Prague 1964. | 
| Reference: | [2] F. Harary: Graph Theory.Addison-Wesley, Reading, Mass. 1969. Zbl 0196.27202, MR 0256911 | 
| Reference: | [3] F. Harary R. M. Karp, W. T. Tutte: A Criterion for Planarity of the Square of a Graph.J. Combinatorial Theory 2 (1967), 395-405. MR 0216976, 10.1016/S0021-9800(67)80050-4 | 
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