title: [Physiological and hygienic justification for a differential system of teaching schoolchildren].
mesh_terms: D002648:Child; D005221:Fatigue / Q000503:physiopathology; D006801:Humans; D012216:Rheumatic Diseases / Q000503:physiopathology; D012572:School Health Services; D013663:Teaching; D013997:Time Factors; D014455:Ukraine; D014938:Work Capacity Evaluation
vernacular_title: Fiziologo-gigienicheskoe obosnovanie differentsial'noĭ sistemy obucheniia shkol'nikov