Quantitative analysis in Sobolev imbedding theorems and applications to spectral theory. Tenth Mathematical School (Summer School, Kaciveli/Nalchik, 1972) [monographie] Titre d'origine: Kolichestvenny analiz v teoremakh vlozheniiï¸ a︡ Soboleva i prilozheniiï¸ a︡ k spektralʹno teorii