Sulfur-mediated mechanochemical synthesis of spherical and needle-like copper sulfide nanocrystals with antibacterial activity / Zh. Shalabayev, Matej Baláž, Nina Daneu, Erika Dutková, Zdenka Bujňáková, Mária Kaňuchová, Zuzana Danková, Ľudmila Balážová, Farit Kh. Urakaev, Ľudmila Tkáčiková, Mukhambetkali Burkitbayev KE304