1. Adams CF, Adams H, Walker FA (1871) Chapters of Erie, and other essays. J. R. Osgood and Company, Boston
2. Agricola G, Hoover H, Hoover LH (1912) Georgius Agricola De re metallica. Published for the translators by The Mining magazine, London
3. Arthur WB (1989) Competing technologies, increasing returns, and lock-in by historical events. Econ J 99(394):116–131. https://doi.org/10.2307/2234208
4. Arthur WB (1994) Increasing returns and path dependence in the economy, economics, cognition, and society. University of Michigan Press, Ann Arbor
5. Atack J (2013) On the use of geographic information systems in economic history: the American transportation revolution revisited. J Econ Hist 73(2):313–338