Penn, John H.
Articles
Michl, Josef;
Fisher, Jeffrey J.;
Penn, John H.;
Doehnert, Detlef,
Polarized IR Spectroscopy of a Triplet 1,3-Biradical: The structure of a Methylene-Bridged 1,8-Naphthoquinodimethane.
Journal of the American Chemical Society 1986,
108(7), 1715 - 1716,
10.1021/ja00267a066 
.
