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Author: Lemmert, Roland

• Lemmert, Roland; Volkmann, Peter: On the positivity of semigroups of operators. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 39 (1998), issue 3, pp. 483-489
• Lemmert, Roland: Zur Eindeutigkeitsbedingung von Nagumo. (German) [On the uniqueness condition of Nagumo]. Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 2, pp. 293-294