The coarseness of a graph
Compositio Mathematica, Volume 19 (1968) no. 4, p. 290-298
@article{CM_1968__19_4_290_0,
     author = {Beineke, Lowell W. and Chartrand, Gary},
     title = {The coarseness of a graph},
     journal = {Compositio Mathematica},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {19},
     number = {4},
     year = {1968},
     pages = {290-298},
     zbl = {0176.22302},
     mrnumber = {240002},
     language = {en},
     url = {http://www.numdam.org/item/CM_1968__19_4_290_0}
}
Beineke, Lowell W.; Chartrand, Gary. The coarseness of a graph. Compositio Mathematica, Volume 19 (1968) no. 4, pp. 290-298. http://www.numdam.org/item/CM_1968__19_4_290_0/

L.W. Beineke [1] On the decomposition of complete graphs into planar and other subgraphs. Doctoral thesis, The University of Michigan, 1965.

K. Kuratowski [2] Sur le problème des courbes gauches en topologie. Fund. Math. 16 (1930), 271-283. | JFM 56.1141.03

W.T. Tutte [3] The thickness of a graph. Indag. Math. 25 (1963), 567-577. | Zbl 0123.17002