00562naa#a2200157#i#450# EN\\bibl\84892 20240706082731.6 2588-0071 20240703b2024####ek#y0engy0150####ca RU Improvement of the public procurement system to ensure economic security under external economic pressure Journal article Nizhny Novgorod Nizhny Novgorod Academy of the Ministry of the Interior of Russia 2024 7 с. Journal article local Vorb'eva Elena Sergeevna namvd.editorum.ru