Mladen Gutev T͡Sonev

• Bŭlgarskoto inzhenerno-arkhitektno druzhestvo v dati i sŭbitii͡a (1893-1949)
• Nezatikhvasht zvŭn ot nakovalni
• Tekhnicheskii͡at progres na Bŭlgarii͡a v dati i sŭbitii͡a
• The V.I. Lenin Higher Institute of Mechanical and Electrical Engineering