V.  Lanzilotto, Lovat, G., Otero, G., Sanchez, L., Lopez, M. Francisca, Mendez, J., Martin-Gago, J. A., Bavdek, G., and Floreano, L., ?Commensurate Growth of Densely Packed PTCDI Islands on the Rutile TiO2(110) Surface?, Journal of Physical Chemistry C, vol. 117, pp. 12639?12647, 2013.