[How many and which were the first factories in the bulgarian lands before the liberation in 1878? Attempt of analysis relying on the sources and the historiography]
(2016)
[The Anarchy, the Russo-Turkish Wars and the Uprisings in the Ottoman Empire from the End of the 18th and the First Decades of the 19th Century as a Factor in the Development of Cities in the Bulgarian Lands Under Ottoman Rule]
(2025)