In 1987 Leo Levitov published 'Solution of the Voynich Manuscript: A liturgical Manual for the Endura Rite of the Cathari Heresy, the Cult of Isis' (the Egyptian goddess - Wikipedia page [1]).

Jacques Guy's article 'On Levitov's Decipherment of the Voynich Manuscript' (1991) can be found here [2]

Dennis J Stallings' 1998 critique is [3].

See also the Wikibooks page [4].