by Jimbo, M., Kruskal, M.D., Miwa, T.
Published in Physics letters. A (01.10.1982)

by Bock, T.L., Kruskal, M.D.
Published in Physics letters. A (01.11.1979)

by Costin, O, Kruskal, M.D, Macintyre, A
Year of Publication 2005

by Costin, O
Year of Publication 15.04.2005

by Kruskal, M. D., Bernstein, I. B., Kulsrud, R. M.
Published in The Astrophysical journal (01.07.1965)