TY JOUR TI TWO-STAGE SIGNATURE RESEARCH: VARIABILITY OR IMPERATIVE KW SIGNATURE RESEARCH METHODS KW TWO-STAGE KW SOLVING THE ISSUE OF THE AUTHENTICITY OF THE SIGNATURE KW ESTABLISHING THE AUTHOR OF AN INAUTHENTIC SIGNATURE KW TYPES OF INAUTHENTIC SIGNATURES KW FEATURES DISPLAYED IN INAUTHENTIC SIGNATURE KW THE PROBLEM OF COMPARABILITY OF SAMPLES JO FORENSIC EXAMINATION AU , .. PY 2025 IS 0 PB Volgograd Academy of the Ministry of Internal Affairs of Russia