Gutman, I.; Markovic, S.; Vesovic, A.; Estrada, E. Approximating total p-electron energy in terms of spectral moments. A quantitative approach. Journal of the Serbian Chemical Society 63, 1998, 639-646.

Gutman, I.; Markovic, S.; Vesovic, A.; Estrada, E. Approximating total p-electron energy in terms of spectral moments. A quantitative approach. Journal of the Serbian Chemical Society 63, 1998, 639-646.