Kyuchukov, Georgi, et al. “NORMS FOR DESTRUCTIVE BENDING MOMENTS OF T-SHAPE CORNER JOINTS OF FRAME STRUCTURAL ELEMENTS MADE OF SOLID SPRUCE WOOD WITH A CROSS-SECTION OF 50 х 30 Mm”. 2026. Innovation in Woodworking Industry and Engineering Design, vol. 8, no. 2, Dec. 2019, http://innojs.ltu.bg/index.php/scjournal-inno/article/view/247.