一类强定向的最小平均距离

郝国亮,谢智红

Minimum average distance of a class of strong orientations

HAO Guoliang,XIE Zhihong

河北大学学报(自然科学版) . 2017, (2): 113 -116 . DOI: 10.3969/j.issn.1000-1565.2017.02.001