NEMEIKŠIS, Giedrius. “THE PROBLEMS OF EVALUATING DATA OBTAINED BY THE SECRET PROCEDURAL INVESTIGATION ACTIONS”. Taikomieji Tyrimai Studijose Ir Praktikoje - Applied Research in Studies and Practice, vol. 18, no. 1, Dec. 2022, pp. 36-43, https://ojs.panko.lt/index.php/ARSP/article/view/174.