Aboulker, P., Cohen, N., Havet, F., Lochet, W., Moura, P. F. S. and Thomassé, S. (2019) “Subdivisions in Digraphs of Large Out-Degree or Large Dichromatic Number”, The Electronic Journal of Combinatorics, 26(3), p. P3.19. doi: 10.37236/6521.