00479naa#a2200169#i#450# EN\INFRA-M\bibl\15104 20241219073948.4 2500-0497 20161229b2016####ek#y0engy0150####ca RUS RU Historical and Legal Aspects of the Preliminary Contract Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Motekhina M. naukaru.ru