[Regarding the Chronology and Questions Currently under Discussion on the Emergence and Use of the Thelegraph during the Crimean War (1853 - 1856)]
(2019)
[Aspects of the Economic Crisis in the Bulgarian Lands during the 1850s and 1860s according to the Data from the Archive of the Krastich Brothers, Merchants from the Town of Svishtov]
(2019)