@article {IOPORT.50026317,
    author       = {Gessel, Ira M. and Li, Ji},
    title        = {Enumeration of point-determining graphs},
    year         = {2011},
    journal      = {J. Comb. Theory, Ser. A},
    volume       = {118},
    number       = {2},
    pages        = {591-612},
    doi          = {10.1016/j.jcta.2010.03.009},
    identifier   = {50026317},
}