@articleLi_Ma_Miao_Shi_Wang_Zhang_2021, title=Nowhere-zero 3-flows in toroidal graphs, volume=153, DOI=10.1016/j.jctb.2021.11.001, journal=Journal of Combinatorial Theory, Series B, publisher=Elsevier BV, author=Li, Jiaao and Ma, Yulai and Miao, Zhengke and Shi, Yongtang and Wang, Weifan and Zhang, Cun-Quan, year=2021, pages=61–80 
LibreCat: /record/34042
DOI: 10.1016/j.jctb.2021.11.001