The present invention relates to a process for the preparation of compounds of general formula Lia-bM1bV2-cM2cx\u2003\u2003wherein M1, M2, a, b, c and x have the following meanings:M1: Na, K, Rb andor Cs,M2: Ti, Zr, Nb, Cr, Mn, Fe, Co, Ni, Al, Mg andor Sc,a: 1. The electrolyte includes a lithium salt, a non-aqueous organic solvent, and a compound represented by Formula : 1wherein R1, R2, and R3 are each independently selected from the group consisting of hydrogen, primary, secondary, and tertiary alkyl groups, alkenyl groups, and aryl groups. The first worm signature is formatted for a first device and the second worm signature is formatted for a second, different device. The clock source selector can be used in an integrated circuit to form a glitch-free multiplexer.