MacKellar L., Wörgötter A. y Wörz J., &quot; Economic Development Problems of Landlocked Countries &quot; , Transition Economics Series, Nº 14, Instituto de Estudios Superiores, Viena.
MacKellar L, Wörgötter A and Wörz J. Economic Development Problems of Landlocked Countries. Transition Economics Series, No. 14. Vienna, Institute of Advanced Studies.