Gutman, I.; Estrada, E.; Rodriguez-Velazquez, J. A. On a graph-spectrum-based structure descriptor. Croatica Chemica Acta 80, 2007, 151-154.

Gutman, I.; Estrada, E.; Rodriguez-Velazquez, J. A. On a graph-spectrum-based structure descriptor. Croatica Chemica Acta 80, 2007, 151-154. [PDF]