Brand, H. R. MPI for Polymer Research, Max Planck Society;
Pleiner, Harald MPI for Polymer Research, Max Planck Society;
Brand, H. R., Cladis, P. E., & Pleiner, H. (2002). Symmetries and physical properties of polar columnar phases in materials composed of achiral molecules. Europhysics Letters, 57(3), 368-374.