Nitriding of the CoCr alloy substrate as the method for improving of the performance of promising biocoatings for hip replacementOrtega Saenz, Javier Alonso; Antonov, Maksim; Michalczewski, Remigiusz18th International Baltic Conference : Engineering Materials & Tribology : BALTMATTRIB-2009 : October 22-23, 2009, Tallinn, Estonia : abstracts2009 / p. 44