Begmatov Pardaboy Abdurakhimovich, associate professor Mekhmonov Mashkhurbek Khusen ugli, associate Professor Eshonov Farhod Faizullaevich, senior Lecturer. “7.21 METHODS OF PERIODICITY OF DEFECTOSCOPIC DIAGNOSTICS OF RAILS”. Innovative Technologies in Construction Scientific Journal, vol. 7, no. 1, May 2024, pp. 79-80, https://inntechcon.uz/index.php/current/article/view/241.