00630naa#a2200181#i#450# EN\\bibl\21702 /en/manage/index 20250130123614.4 2077-7566 20160726b2016####ek#y0engy0150####ca RU Сalcium-phosphorus balance and bone metabolism markers estimation in the combination therapy of patients with chronic generalized severe periodontitis Journal article Ekaterinburg TIRAZH Publishing House 2016 4 с. Journal article local Gurtovaya M. N. Kazakova A. V. fht.editorum.ru /en/manage/index