The following publications are possibly variants of this publication:
- On the classification of extremal even formally self-dual codes of lengths 20 and 22J. E. Fields, Philippe Gaborit, W. Cary Huffman, Vera Pless. DAM, 111(1-2):75-86, 2001.
- On the Classification of Extremal Even Formally Self-Dual CodesJ. E. Fields, Philippe Gaborit, W. Cary Huffman, Vera Pless. dcc, 18(1/3):125-148, 1999.