共 4 条
[1]
ASTALA K, 1908, U JOENSUU PUBL SCI, V14
[3]
Koskela P., 1994, Rev. Mat. Iberoamericana, V10, P123, DOI DOI 10.4171/RMI/147
[4]
Prawitz H., 1927, ARK MAT ASTRON FYS, V20, P1