Molekel should be cited as:
Varetto, Ugo, Maria G. Giuffreda, and Yun Jang.
"Molekel: A program for the visualization of quantum chemistry data."
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY. Vol. 238.
1155 16TH ST, NW, WASHINGTON, DC 20036 USA: AMER CHEMICAL SOC, 2009.