TY JOUR TI CLASSIFICATION OF DATA, DETERMINING THE STRUCTURE OF THE SYSTEM OF MAINTENANCE OF SPORT COMPETITIONS (BY THE EXAMPLE OF TENNIS) KW system of maintenance of sport competitions KW tennis KW system of factors KW IT-technology KW RFID-tags JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Popov, A.. AU Kochkina, V.. PY 2014 IS 2014 PB Astrakhan State Technical University