The effect of pressure on the phase transitions in MTPP(TCNQ) 2 and MTPA(TCNQ)2 : an ESR study A. Graja, G. Sekretarczyk and M. Krupski J. Phys. France, 46 10 (1985) 1743-1749 DOI: 10.1051/jphys:0198500460100174300