Bahchevandziev, K., and N. Mihajlovski. “Surface Retention of Polyurethane and Acrylic Coatings on Impregnated Spruce Wood (Picea Abies Karst) and Comparison With Some Wood Preservatives”. Baltic Forestry, vol. 27, no. 2, Feb. 2022, doi:10.46490/BF223.