共 9 条
[1]
APPERT A, 1947, CR HEBD ACAD SCI, V224, P442
[2]
Busemann H., 1955, GEOMETRY GEODESICS
[3]
COHEN LW, 1950, P AM MATH SOC, V1, P750
[5]
Kelley J.L., 1955, GEN TOPOLOGY
[9]
[No title captured]