TY JOUR TI MODEL OF THE SUB-CENTER OF THE ST. PETERSBURG AGGLOMERATION (ON THE EXAMPLE OF NOVOSARATOVKA VILLAGE). DEVELOPMENT CONCEPT OF THE CITY CENTER KW St. Petersburg agglomeration; polycentric model; peripheral territories; sub-center; the village of Novosaratovka; city center (subcenter); concept of territory development; project proposal JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Zima, A.G. PY 2023 IS 8 PB Belgorod State Technological University named after V.G. Shukhov