W. A. P. Claassen

The elastic constants of nematic liquid crystalline terminally substituted azoxybenzenes

W. H. Jeu, W. Claassen, W. H. de Jeu, 1977 .

The Determination of the Elastic Constants of Nematic Liquid Crystals

A. M. J. Spruijt, W. H. Jeu, W. Claassen, 1976 .