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Author: Sun, Lei

• Song, Lili; Sun, Lei: 1-planar graphs with girth at least 6 are (1,1,1,1)-colorable. (English). Czechoslovak Mathematical Journal, vol. 73 (2023), issue 4, pp. 993-1006
• Chu, Yanan; Sun, Lei; Yue, Jun: Note on improper coloring of $1$-planar graphs. (English). Czechoslovak Mathematical Journal, vol. 69 (2019), issue 4, pp. 955-968