1. Clinical investigation of methotrexate in the treatment of ankylosing spondylitis;Altan;Scandinavian Journal of Rheumatology,2001
2. Is methotrexate effective in ankylosing spondylitis?;Roychowdhury;Rheumatology (Oxford),2002
3. Methotrexate in severe ankylosing spondylitis: A randomised placebo controlled , double-blind observer study;Roychowdhury;Rheumatology,2001
4. Guidelines for the management of rheumatoid arthritis;Arthritis & Rheumatism,2002
5. Efficacy of methotrexate in the treatment of ankylosing spondylitis: a three-year open study;Biasi;Clinical Rheumatology,2000