RT Article T1 Exploring the defensive actions of drug sellers in open-air markets: A systematic social observation JF Journal of research in crime and delinquency VO 53 IS 1 SP 36 OP 65 A1 Piza, Eric L. A2 Sytsma, Victoria A. LA English YR 2016 UL https://krimdok.uni-tuebingen.de/Record/1912551209 DO 10.1177/0022427815592451