1. V. V. Ishkhanov, “On the semidirect imbedding problem with nilpotent kernel,” Izv. AN SSSR, Ser. Mat., 40, No. 1, 3–25 (1976).
2. D. D. Kiselev, “Examples of embedding problems the only solutions of which are fields,” Usp. Mat. Nauk, 68, No. 4, 181–182 (2013).
3. D. D. Kiselev and B. B. Lur’e, “Ultrasolvability and singularity in the embedding problem,” Zap. Nauchn. Semin. POMI, 414, 113–126 (2013).
4. V. V. Ishkhanov, B. B. Lur’e, and D. K. Faddeev, The Embedding Problem in Galois Theory [in Russian], Nauka, Moscow (1990).
5. A. V. Yakovlev, “The embedding problem for fields,” Izv. AN SSSR, Ser. Mat., 28, No. 3, 645–660 (1964).