SYNTHESIS AND PHYSICAL PROPERTIES OF DIMETHYL TRIMETHYLENE TETRATHIA-FULVALENIUM SALTS P. Delhaes, E. Dupart, J. Amiell, C. Coulon, J.M. Fabre, L. Giral, D. Chasseau and B. Gallois J. Phys. Colloques, 44 C3 (1983) C3-1239-C3-1242 DOI: 10.1051/jphyscol/1983172