Закостенели именни падежни форми, функциониращи като наречия, в българския и полския език

In Bulgarian and Polish some petrified noun case forms occur as adverbs, formed by semantic and formal change during the process of adverbialization of Prepositional Phrases and by semantic derivation (conversion) of nominal case forms. Singular forms of nouns in the Accusative, the Instrumental and the Locative cases prevail among the adverbialized forms. The contrastive analysis shows an almost total lack of dative adverbs in Bulgarian. The „definite/indefinite“ correlation of temporal adverbs is also an important typological feature in Bulgarian.