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SEARCH RESULTS Please specify criteria. SEARCH By author: By title: SEARCH tips: Use initials to refine search Initials without last name are considered invalid. Wrong: You may write two or more names: > > This means "Timofeev" OR "Ivanov" Use "Title" field to search for articles with given combination of words. When several words are entered, they all required to present in article title. Search results are sorted by publication date - most recent articles first