Complex sentence: On 3 April 2007 he was habilitated at the Department of Economics of the University of Bialystok after defending a dissertation titled "Transport and dynamics of economic growth of South-eastern Baltic countries".
Split into simpler sentences: On 3 April 2007 he was habilitated at the Department of Economics of the University of Bialystok. He defended a dissertation titled "Transport and dynamics of economic growth of South-eastern Baltic countries".