Author: Havel, Ivan

Berrachedi, Abdelhafid; Havel, Ivan; Mulder, Henry Martyn: Spherical and clockwise spherical graphs. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 2, pp. 295-309
Havel, Ivan; Morávek, Jaroslav: $B$-valuations of graphs. (English). Czechoslovak Mathematical Journal, vol. 22 (1972), issue 2, pp. 338-351

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