Studies of New Layer Formation on the Surface of Zinc Doped Hydroxyapatite/Chitosan Composite Coatings in Biological Medium. - Motelica-Heino, Mikael; Predoi, Mihai Valentin; Ciobanu, Steluta Carmen; Iconaru, Simona Liliana; Predoi, Daniela (Coatings (2079-6412), 2023)