Buch, C. M., Kleinert, J., & Toubal, F. (2003). The distance puzzle: On the interpretation of the distance coefficient in gravity equations. Inst. for World Economics.
Chicago Style (17th ed.) CitationBuch, Claudia M., Jörn Kleinert, and Farid Toubal. The Distance Puzzle: On the Interpretation of the Distance Coefficient in Gravity Equations. Kiel: Inst. for World Economics, 2003.
MLA (9th ed.) CitationBuch, Claudia M., et al. The Distance Puzzle: On the Interpretation of the Distance Coefficient in Gravity Equations. Inst. for World Economics, 2003.
Warning: These citations may not always be 100% accurate.