Crampton 1987, p. 16: "...a Balkan alliance, which alarmed both Bulgarians and Turks with its implications of Serbian expansionism as expounded two decades previously, in Garasanin's Nacertanie, the Serbian equivalent of Greek Megali Idea." Crampton, R. J. (1987). A Short History of Modern Bulgaria. CUP Archive. p. 16. ISBN978-0-521-27323-7.
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SANU 1993, p. 172: "The result of Nacertumje's implementation was the establishment of the first Balkan alliance (1866–1868)..." SANU (1993). Balcanica. Srpska Akademija Nauka i Umetnosti, Balkanološki Institut.