Velickovic, Z. S., and V. D. Pavlovic. “The Performance of the Modified GCC Technique for Differential Time Delay Estimation in the Cooperative Sensor Network”. Elektronika Ir Elektrotechnika, vol. 19, no. 8, Sept. 2013, pp. 119-22, doi:10.5755/j01.eee.19.8.2445.