A.  Basagni, Colazzo, L., Sedona, F., DiMarino, M., Carofiglio, T., Lubian, E., Forrer, D., Vittadini, A., Casarin, M., Verdini, A., Cossaro, A., Floreano, L., and Sambi, M., ?Stereoselective Photopolymerization of Tetraphenylporphyrin Derivatives on Ag(110) at the Sub-Monolayer Level?, Chemistry A European Journal, vol. 20, pp. 14296?14304, 2014.