P. Rettig

Treatment of pediatric localized scleroderma with methotrexate.

J. Burnham, R. Cron, A. Yan, 2006, The Journal of rheumatology.

Hypophyseal-pituitary-adrenal axis in autoimmune and rheumatic diseases

B. Athreya, W. V. Williams, P. Rettig, 1998, Immunologic research.

Sjögren syndrome in a child: favorable response of the arthritis to TNFα blockade

R. Cron, F. Pessler, P. Kreiger, 2006, Clinical Rheumatology.

Methotrexate used as a steroid-sparing agent in non-renal chronic Henoch-Schönlein purpura.

R. Cron, P. Rettig, 2003, Clinical and experimental rheumatology.