TY - JOUR AU - Gnecco E. PY - 2010 DO - 10.1209/0295-5075/91/66008 UR - http://hdl.handle.net/20.500.12614/655 T2 - EPL LA - en TI - Quasi-isotropy of static friction on hexagonal surface lattices TY - research article VL - 91 ER -