1 K. B. Lee, "There are only finitely many infra-nilmanifolds under each manifold" 39 (39): 61-66, 1988
2 P. Scott, "The geometries of 3-manifolds" 15 : 401-489, 1983
3 P. Orlik, "Seifert Manifolds" Springer-Verlag 1972
4 K. B. Lee, "Rigidity of almost crystallographic groups" 44 : 73-78, 1985
5 F. Waldhausen, "On irreducible 3-manifolds which are sufficiently large" 87 (87): 56-88, 1968
6 W. Heil, "On P 2-irreducible 3-manifolds" 75 : 772-775, 1969
7 S. Wolfram, "Mathematica" Wolfram Research 1993
8 J. Hempel, "Free cyclic actions of S 1 × S 1 × S 1" 48 (48): 221-227, 1975
9 H. Y. Chu, "Free actions of finite groups on the 3-dimensional nilmanifold" 144 : 255-270, 2004
10 K. B. Lee, "Free actions of finite abelian groups on the 3-Torus" 53 : 153-175, 1993
1 K. B. Lee, "There are only finitely many infra-nilmanifolds under each manifold" 39 (39): 61-66, 1988
2 P. Scott, "The geometries of 3-manifolds" 15 : 401-489, 1983
3 P. Orlik, "Seifert Manifolds" Springer-Verlag 1972
4 K. B. Lee, "Rigidity of almost crystallographic groups" 44 : 73-78, 1985
5 F. Waldhausen, "On irreducible 3-manifolds which are sufficiently large" 87 (87): 56-88, 1968
6 W. Heil, "On P 2-irreducible 3-manifolds" 75 : 772-775, 1969
7 S. Wolfram, "Mathematica" Wolfram Research 1993
8 J. Hempel, "Free cyclic actions of S 1 × S 1 × S 1" 48 (48): 221-227, 1975
9 H. Y. Chu, "Free actions of finite groups on the 3-dimensional nilmanifold" 144 : 255-270, 2004
10 K. B. Lee, "Free actions of finite abelian groups on the 3-Torus" 53 : 153-175, 1993
11 최동순, "Free actions of finite abelian groups on 3-dimensional nilmanifolds" 대한수학회 42 (42): 795-826, 2005
12 K. Y. Ha, "Classification of free actions of finite groups on the 3-torus" 121 (121): 469-507, 2002
13 구대환, "CLASSIFICATION OF FREE ACTIONS OF FINITE GROUPS ON 3-DIMENSIONAL NILMANIFOLDS" 대한수학회 54 (54): 1411-1440, 2017
14 W. Heil, "Almost sufficiently large Seifert fiber spaces" 20 : 217-223, 1973
15 K. Dekimpe, "Affine structures for closed 3-dimensional manifolds with nil-geometry" 46 (46): 141-167, 1995