Gnecco E.2020-12-042020-12-042010http://hdl.handle.net/20.500.12614/655enAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Quasi-isotropy of static friction on hexagonal surface latticesresearch article10.1209/0295-5075/91/66008