1. Asacol product monograph,1992
2. Pentasa product monograph,1993
3. Salofalk product monograph,1994
4. Teratologic studies of methyl 5-aminosalicylate and salicylazopyridine;Xiong;Chung-Kuo Yao Li Hsueh Pao-Acta Pharmacol Sin,1992
5. Drug information correspondence druginfo/corresp/50717 ala1-2;Arbuckle,1995