Geodesic
Controllable graphs
Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 36 (2011) no. 1.

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The eigenvalues of a graph are the eigenvalues of its adjacency matrix. An eigenvalue of a graph is called {\em main} if the corresponding eigenspace contains a vector for which the sum of coordinates is different from 0. Connected graphs in which all eigenvalues are mutually distinct and main have recently attracted attention in control theory. 
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     author = {D. Cvetkovi\'c and P. Rowlinson and Z. Stani\'c and M.-G. Yoon},
     title = {Controllable graphs},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
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D. Cvetković; P. Rowlinson; Z. Stanić; M.-G. Yoon. Controllable graphs. Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 36 (2011) no. 1. http://geodesic.mathdoc.fr/item/BASS_2011_36_1_a5/