Boyanov, Petar. “A COMPREHENSIVE SCANNING FOR OPEN, CLOSED AND FILTERED PORTS IN THE COMPUTER SYSTEMS AND NETWORKS: A COMPREHENSIVE SCANNING FOR OPEN, CLOSED AND FILTERED PORTS IN THE COMPUTER SYSTEMS AND NETWORKS”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 23, no. 1 (March 26, 2023): 85–98. Accessed November 21, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/356.