Sela, Zlil (2006년 6월). “Diophantine geometry over groups. VI. The elementary theory of a free group”. 《Geometric and Functional Analysis》 (영어) 16 (3): 707–730. doi:10.1007/s00039-006-0565-8. ISSN1016-443X. MR2238945.
Sela, Zlil (2014). “A report on Tarski’s decidability problem: “Elementary theory of free nonabelian groups” by O. Kharlampovich and A. Myasnikov” (영어). arXiv:1401.5711. Bibcode:2014arXiv1401.5711S.
Schreier, Otto (1927). “Die Untergruppen der freien Gruppe”. 《Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg》 (독일어) 5: 161–183. doi:10.1007/BF02952517.
Tarski, Alfred; Sinaceur, Hourya (2000년 3월). “Address at the Princeton University Bicentennial Conference on Problems of Mathematics (December 17-19, 1946)”. 《The Bulletin of Symbolic Logic》 (영어) 6 (1): 1–14. doi:10.2307/421074. JSTOR421074.
Sela, Zlil (2006년 6월). “Diophantine geometry over groups. VI. The elementary theory of a free group”. 《Geometric and Functional Analysis》 (영어) 16 (3): 707–730. doi:10.1007/s00039-006-0565-8. ISSN1016-443X. MR2238945.
Sela, Zlil (2014). “A report on Tarski’s decidability problem: “Elementary theory of free nonabelian groups” by O. Kharlampovich and A. Myasnikov” (영어). arXiv:1401.5711. Bibcode:2014arXiv1401.5711S.
Tarski, Alfred; Sinaceur, Hourya (2000년 3월). “Address at the Princeton University Bicentennial Conference on Problems of Mathematics (December 17-19, 1946)”. 《The Bulletin of Symbolic Logic》 (영어) 6 (1): 1–14. doi:10.2307/421074. JSTOR421074.
Sela, Zlil (2006년 6월). “Diophantine geometry over groups. VI. The elementary theory of a free group”. 《Geometric and Functional Analysis》 (영어) 16 (3): 707–730. doi:10.1007/s00039-006-0565-8. ISSN1016-443X. MR2238945.