D. B. Wiedemeier, Abiven, S., Hockaday, W. C., Keiluweit, M., Kleber, M., Masiello, C. A., McBeath, A. V., Nico, P. S., Pyle, L. A., Schneider, M. P. W., Smernik, R. J., Wiesenberg, G. L. B., and Schmidt, M. W. I.,
“Aromaticity and degree of aromatic condensation of char”,
Organic Geochemistry, vol. 78, pp. 135 - 143, 2015.