Terahertz generation from single and multiple filaments in airO. Kosareva, N. Panov, D. Shipilo, V. Andreeva, T.-J. Wang, Y. Chen, W. Liu, A. Savel’ev and A. ShkurinovEPJ Web Conf., 195 (2018) 03013DOI: https://doi.org/10.1051/epjconf/201819503013