Katritzky, Alan R.; Drewniak, Malgorzata; Aurrecoechea, Jose M.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1987 , p. 2539 - 2542
Barluenga, Jose; Aznar, Fernando; Liz, Ramon; Rodes, Rosa
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , # 5 p. 1087 - 1091