The phenomenon of quantum interference in superconducting multi-connected samples is presented. Experiments conducted on both low and high critical temperature superconducting systems reveal that the oscillations of magnetoresistance serve as a universal fingerprint of the wave-like behavior of superconducting state at a mesoscopic scale. Various theoretical models, ranging from thermodynamic approaches to the transmission of supercurrents across the ring, are discussed to account for the differences in the sinusoid amplitude of magnetoresistance oscillations in both kinds of superconductors.