Begmatov Pardaboy Abdurakhimovich, Associate Professor Eshonov Farhod Faizullaevich, Senior Lecturer, “7.1 ANALYSIS OF METHODS OF CALCULATION OF PERIODICITY OF DEFECTOSCOPIC DIAGNOSTICS OF RAIL CONDITION IN THE TRACK”, Inntechcon, vol. 7, no. 1, pp. 3–5, May 2024.