The following publications are possibly variants of this publication:
- Construction of Extremal Type II Codes over ZPhilippe Gaborit, Masaaki Harada. dcc, 16(3):257-269, 1999.
- New Extremal Type II Codes over Z::4::Masaaki Harada. dcc, 13(3):271-284, 1998.
- Extremal Type II Z::4::-codes of lengths 56 and 64Masaaki Harada. JCT, 117(8):1285-1288, 2010. [doi]
- Optimal Double Circulant Z::4::-CodesT. Aaron Gulliver, Masaaki Harada. AAECC 2001: 122-128 [doi]
- On the existence of extremal Type II codes over Z::6::Masaaki Harada. DM, 223(1-3):373-378, 2000. [doi]