Eigenfunctions of Durrmeyer-type modifications of Meyer-König and Zeller operators. - Margareta Heilmann (J. Approx. Theory, 2003)

Convergence of iterates of genuine and ultraspherical Durrmeyer operators to the limiting semigroup: C2-estimates. - Heiner Gonska; Margareta Heilmann; Ioan Rasa (J. Approx. Theory, 2009)

Collusion-Secure Fingerprint Watermarking for Real World Applications. - Marcel Schäfer; Waldemar Berchtold; Martin Steinebach; Sascha Zmudzinski; Margareta Heilmann; Stefan Katzenbeisser 001 (Sicherheit, 2010)

A Nice Representation for a Link Between Bernstein-Durrmeyer and Kantorovich Operators. - Margareta Heilmann; Ioan Rasa (ICMC, 2017)

Pointwise convergence of the Bernstein-Durrmeyer operators with respect to a collection of measures. - Elena E. Berdysheva; Margareta Heilmann; Katharina Hennings (J. Approx. Theory, 2020)

Convergence of linking Baskakov-type operators. - Ulrich Abel; Margareta Heilmann; Vitaliy Kushnirevych (Period. Math. Hung., 2020)

Poisson approximation to the binomial distribution: extensions to the convergence of positive operators. - Ana Maria Acu; Margareta Heilmann; Ioan Rasa; Andra Seserman (CoRR, 2022)

Asymptotic properties for a general class of Szasz-Mirakjan-Durrmeyer operators. - Ulrich Abel; Ana Maria Acu; Margareta Heilmann; Ioan Rasa (CoRR, 2024)

Commutativity and spectral properties for a general class of Szasz-Mirakjan-Durrmeyer operators. - Ulrich Abel; Ana Maria Acu; Margareta Heilmann; Ioan Rasa (CoRR, 2024)