One-sided approximation by entire functions. - Friedrich Littmann (J. Approx. Theory, 2006)

Zeros of Bernoulli-type functions and best approximations. - Friedrich Littmann (J. Approx. Theory, 2009)

L1-approximation to Laplace transforms of signed measures. - Friedrich Littmann (J. Approx. Theory, 2011)

Quadrature and Extremal Bandlimited Functions. - Friedrich Littmann (SIAM J. Math. Anal., 2013)

Conjugate Phase Retrieval in Paley-Wiener Space. - Chun-Kit Lai; Friedrich Littmann; Eric S. Weber (CoRR, 2019)