RussGus: 3 hits for Nicholas I

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus) contains about 170.000 records from 1974 to 2003 and collects publications of different document types: books, dissertations and other university publications, articles from journals and newspapers including reviews, maps etc. The lists of personal and geographical subjects are located here and here.

Your search for Nicholas I provides 3 hits
1	Roberts, Ian W.: Nicholas I and the Russian Intervention in Hungary. Roth, Harald, in: Südost-Forschungen, 52, 1993, S. 361-363 (Rezension)
2	Michael Stanislawski: Tsar Nicholas I and the Jews. The Transformation of Jewish Society in Russia 1825-1855 Hildermeier, Manfred, in: Jahrbücher für Geschichte Osteuropas, 33, 1985, S. 587-590 (Rezension)
3	Verner, Andrew M.: The Crisis of Russian Autocracy. Nicholas II and the 1905 Revolution. (=Studies of the Harriman Institute, Columbia University) Grenzer, Andreas, in: Jahrbücher für Geschichte Osteuropas, 40, 1992, S. 431-432 (Rezension)

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

Roberts, Ian W.: Nicholas I and the Russian Intervention in Hungary.

Michael Stanislawski: Tsar Nicholas I and the Jews. The Transformation of Jewish Society in Russia 1825-1855

Verner, Andrew M.: The Crisis of Russian Autocracy. Nicholas II and the 1905 Revolution. (=Studies of the Harriman Institute, Columbia University)