23 May – Romania introduces a tariff on imported goods to protect local industry, which leads to Austria-Hungary introducing new custom duties on imports and the Romanian-Austro-Hungarian customs war. It lasts until December 1893.[4]
^Treptow, Kurt W. (2001). A History of Romania. Iaşi: Center for Romanian Studies. p. 597. ISBN978-9-73943-235-1.
^Giurescu, Constantin C.; Matei, Horia C.; Popa, Marcel; Alexandrescu, Ion; Chiper, Ioan (1974). Chronological History of Romania. Bucharest: Enciclopedică Română. p. 462. OCLC251025169.
^Goldstein, Erik (1992). Wars and Peace Treaties: 1816 to 1991. London: Taylor & Francis. p. 35. ISBN978-1-13489-912-8.
^Crăciun, Dumitru; Ucrain, Constantin (1988). Raiduri aeriene românești [Romanian Air Raids]. Iasi: Junimea. p. 26. OCLC21374038.
^Institutul de Istoria Artei (Academia Română) (1974). Pagini de artă modernă românească. Bucharest: Editura Academiei Republicii socialiste România. OCLC583168758.