no. 2
The point-outercoarseness of complete n-partite graphs
Compositio Mathematica, Tome 26 (1973) no. 2, pp. 101-110. 
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Mitchem, John. The point-outercoarseness of complete $n$-partite graphs. Compositio Mathematica, Tome 26 (1973) no. 2, pp. 101-110. http://www.numdam.org/item/CM_1973__26_2_101_0/

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