 A 1986 book on "qi" identifies "dim mak" as "one of the secret specialities" of "wing chun".However, this matter is not identified in the "ving tsun kin kut" and traditional practitioners of "ving tsun" ("wing chun") take no stance in the matter.During the late 1980s, Erle Montaigue (1949–2011) published a number of books and instruction videos on "dim mak" with Paladin Press.