The term "Chilakamarri graphs" is used in this work for a set of graphs on 12, 24, and 47 vertices used in the construction of the 47-vertex unit-distance graph with chromatic number 4 and girth 4. For a time, this was the smallest known such graph, but has subsequently been supplanted by smaller graphs, culminating in the presumed to be smallest possible 17-vertex Exoo-Ismailescu graph.
The Chilakamarri butterfly graph has graph crossing number 12.
