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Flentje M, Weirich A, Pötter R, Ludwig R.Flentje M, et al. Among authors: ludwig r.Radiother Oncol. 1994 Jun;31(3):222-8. doi: 10.1016/0167-8140(94)90427-8.Radiother Oncol. 1994.PMID: 8066205Clinical Trial.
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Weirich A, Leuschner I, Harms D, Vujanic GM, Tröger J, Abel U, Graf N, Schmidt D, Ludwig R, Voûte PA.Weirich A, et al. Among authors: ludwig r.Ann Oncol. 2001 Mar;12(3):311-9. doi: 10.1023/a:1011167924230.Ann Oncol. 2001.PMID: 11332141Free article.Clinical Trial.
Weirich A, Ludwig R, Graf N, Abel U, Leuschner I, Vujanic GM, Mehls O, Boos J, Beck J, Royer-Pokora B, Voûte PA.Weirich A, et al. Among authors: ludwig r.Ann Oncol. 2004 May;15(5):808-20. doi: 10.1093/annonc/mdh171.Ann Oncol. 2004.PMID: 15111352Free article.
Volm M, Mattern J, Stammler G, Royer-Pokora B, Schneider S, Weirich A, Ludwig R.Volm M, et al. Among authors: ludwig r.Int J Cancer. 1995 Oct 9;63(2):193-7. doi: 10.1002/ijc.2910630208.Int J Cancer. 1995.PMID: 7591203
Weirich A, Rieden K, Tröger J, Schmidt D, Ludwig R.Weirich A, et al. Among authors: ludwig r.Klin Padiatr. 1991 Jul-Aug;203(4):251-6. doi: 10.1055/s-2007-1025437.Klin Padiatr. 1991.PMID: 1658429German.