Mechanisms of particle ejection from free-standing two-layered graphene stimulated by keV argon gas cluster projectile bombardment : molecular dynamics study / Gołuński Mikołaj , Hrabar Sviatoslav , Postawa Zbigniew // Surface and Coatings Technology. - 2020 vol. 391. - ISSN 0257-8972. - eISSN 1879-3347