Research methods for tribological properties of restorative and preventive coatings in different lubricating media at sliding friction / aut. Mitko Nikolov, Plamen Kangalov. -- ilustr. -- Bibliografické odkazy. In: Acta technologica agriculturae. -- ISSN 1335-2555. -- Vol. 17, iss. 3 (2014), s. 70-74. https://doi.org/10.2478/ata-2014-0016 trenie * mazanie * tribológia * opotrebenie materiálov * skúšky opotrebenia