, ▁ 1 9 8 1 ▁ ▁On th oph ag us ▁st om ach os us ▁Kre ll , ▁ 2 0 0 9 ▁ ▁On th oph ag us ▁stra bo ▁Re itter , ▁ 1 8 9 2 ▁ ▁On th oph ag us ▁str and i ▁B alth as ar , ▁ 1 9 3 5 ▁ ▁On th oph ag us ▁stre lt so vi ▁Tar as ov ▁& ▁Kab akov , ▁ 2 0 1 0 ▁ ▁On th oph ag us ▁stri at ulus ▁( P alis ot ▁de ▁Beau vo is , ▁ 1 8 0 9 ) ▁ ▁On th oph ag us ▁strict est ri atus ▁D ' Or b igny , ▁ 1 9 1 3 ▁ ▁On th oph ag us ▁str n adi ▁Kab akov , ▁ 1 9 9 8 ▁ ▁On th oph ag us ▁st u hl mann i ▁D ' Or b igny , ▁ 1 9 0 8 ▁ ▁On th oph ag us ▁sty loc er us ▁Gra ë ll s , ▁ 1 8 5 1 ▁ ▁On th oph ag us ▁sub a ene us ▁( P alis ot ▁de ▁Beau vo is , ▁ 1 8 1 1 ) ▁ ▁On th oph ag us ▁sub altern ans ▁D ' Or b igny , ▁ 1 9 0 2 ▁ ▁On th oph ag us ▁sub ans iri ensis ▁Bis was , ▁ 1 9 7 9 ▁ ▁On th oph