00507naa#a2200169#i#450# EN\INFRA-M\bibl\12486 20260117044819.6 2500-0489 20160425b2016####ek#y0engy0150####ca RUS RU Playfulness horse russian trotter, depending on age and exterior floor features Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Farkhutdinov Kamil zh-szf.ru