Model catalysts obtained by cluster deposition of Palladium onto HOPG. TEM and STM characterisation Francisco José Cadete Santos Aires, Philippe Sautet, Gilbert Fuchs, Jean-Luc Rousset and Patrice MélinonMicrosc. Microanal. Microstruct., 4 5 (1993) 441-452DOI: https://doi.org/10.1051/mmm:0199300405044100