Algebraic Semantics for Quasi-Classical Modal Logics. - Willem J. Blok; P. Kohler (J. Symb. Log., 1983)

Asymptotically Sharp Error Estimates for Modified Compound Quadrature Formulae for Cauchy Principal Value Integrals. - Fabrizio d'Amore; P. Kohler (Computing, 1995)

Status of the airborne dispersive pushbroom imaging spectrometer APEX (Airborne Prism Experiment). - Michael E. Schaepman; Klaus I. Itten; Daniel Schläpfer; J. W. Kaiser; Jason Brazile; Walter Debruyn; A. Neukom; H. Feusi; P. Adolph; R. Moser; T. Schilliger; L. De Vos; et al. (IGARSS, 2003)