On graphs satisfying a local Ore-type condition
Armen S. Asratian, Hajo J. Broersma, Jan van den Heuvel, H.J. Veldman · Journal of Graph Theory · 1996
{For an integer i, a graph is called an Li-graph if, for each triple of vertices u, v, w with d(u, v) = 2 and w (element of) N(u) (intersection) N(v), d(u) + d(v) ≥ | N(u) (union) N(v) (union) N(w) ...