G. Ringel
发表
G. Ringel,
1974
.
G. Ringel,
B. Jackson,
1984
.
G. Ringel,
B. Jackson,
1984
.
G. Ringel,
J. Youngs,
1968,
Proceedings of the National Academy of Sciences of the United States of America.
G. Ringel,
M. Jungerman,
1980
.
G. Ringel,
N. Hartsfield,
2007
.
Gerhard Ringel,
G. Ringel,
B. Jackson,
1984
.
Brad Jackson,
Gerhard Ringel,
G. Ringel,
2000,
Discret. Math..
Gerhard Ringel,
G. Ringel,
1978
.
Nora Hartsfield,
Gerhard Ringel,
G. Ringel,
1994
.
Gerhard Ringel,
G. Ringel,
B. Jackson,
1984
.
Hanfried Lenz,
Gerhard Ringel,
G. Ringel,
1991,
Discret. Math..
G. Ringel,
E. Niecke,
1977
.
Nora Hartsfield,
Brad Jackson,
Gerhard Ringel,
1985,
Graphs Comb..
Brad Jackson,
Gerhard Ringel,
G. Ringel,
1985,
J. Comb. Theory, Ser. B.
G. Ringel,
B. Jackson,
1984,
Bulletin of the Australian Mathematical Society.
Gerhard Ringel,
G. Ringel,
J. Youngs,
1969
.
Brad Jackson,
Gerhard Ringel,
G. Ringel,
1983,
Discret. Math..
G. Ringel,
B. Jackson,
1983
.
Gerhard Ringel,
G. Ringel,
1977,
J. Graph Theory.
Nora Hartsfield,
Gerhard Ringel,
G. Ringel,
1989,
J. Comb. Theory, Ser. A.
G. Ringel,
1972
.
G. Ringel,
N. Hartsfield,
1988
.