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Hanssler L, Metz KA, Roll C, Hennecke KH.Hanssler L, et al. Among authors: roll c.Monatsschr Kinderheilkd. 1990 Nov;138(11):772-4.Monatsschr Kinderheilkd. 1990.PMID: 2290437German.
Hanssler L, Roll C.Hanssler L, et al. Among authors: roll c.Monatsschr Kinderheilkd. 1990 Oct;138(10):692-5.Monatsschr Kinderheilkd. 1990.PMID: 2079947Review.German.
Hanssler L, Roll C.Hanssler L, et al. Among authors: roll c.Klin Padiatr. 1994 Jan-Feb;206(1):55-8. doi: 10.1055/s-2008-1046582.Klin Padiatr. 1994.PMID: 8152208German.
Roll C, Lange R, Klüting N, Hanssler L.Roll C, et al.Monatsschr Kinderheilkd. 1991 Oct;139(10):699-702.Monatsschr Kinderheilkd. 1991.PMID: 1961211German.