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2. J. Averka, J. Kruopis, and R. Lekevičius, Estimators of duration of mitotic cycle stages in asynchronous cell populations, in Abstracts of the 3rd Vilnius International Conference on Probability Theory and Mathematical Statistics, Vilnius, 1981, pp. 252–253 (in Russian).
3. V. Bagdonavičus and J. Kruopis, Mathematical Statistics. Part I, TEV, Vilnius, 2007 (in Lithuanian).
4. V. Bagdonavičus and J. Kruopis, Mathematical Statistics. Part 1. Parametric Statistics, Vilnius Univ. Press, Vilnius, 2015 (in Lithuanian).
5. V. Bagdonavičus and J. Kruopis, Mathematical Statistics. Part 2. Linear Models, Vilnius Univ. Press, Vilnius, 2015 (in Lithuanian).