This article is cited and partially represented in review
M. Randic, “Aromaticity of Polycyclic Conjugated Hydrocarbons”.
Chem.
Rev., 103 (2003) 3449-3605.
at page 3531 as reference No. 668. One can view the relevant part of
this paper here, or download the whole
paper at:
http://pubs.acs.org/cgi-bin/article.cgi/chreay/2003/103/i09/pdf/cr9903656.pdf