1. Lecturer, Division of Structural Design, Faculty of Civil Engineering, HCMC Univ. of Technology, 268 Ly Thuong Kiet, District 10, Ho Chi Minh City, Vietnam; formerly, Dept. of Masonry and Concrete Structures, Faculty of Civil Engineering, Technical Univ. of Košice, Letná 9, 042 00 Košice, Slovakia.
2. Associate Professor, Dept. of Architecture, Faculty of Art, Dept. of Masonry and Concrete Structures, Faculty of Civil Engineering, Technical Univ. of Košice, Letná 9, 042 00 Košice, Slovakia (corresponding author).