Ternary and quaternary nanocrystalline Cu-based sulfides as perspective antibacterial materials mechanochemically synthesized in a scalable fashion / Matej Baláž, Ľudmila Tkáčiková, Martin Stahorský, Mariano Casas-Luna, Erika Dutková, Ladislav Čelko, Mária Kováčová, Marcela Achimovičová, Peter Baláž KE304