http://www-class.unl.edu/chem251/alkenes-1/zaitsevs_rule.htm (http://www-class.unl.edu/chem251/alkenes-1/zaitsevs_rule.htm)
http://www.chem.wsu.edu/chem240/AlkeneElim.html (http://www.chem.wsu.edu/chem240/AlkeneElim.html)
http://www.molecules.org/experiments/Moores/Moores.html (http://www.molecules.org/experiments/Moores/Moores.html)