Dong, P., Bui, P. and Pham, Q. 2014. A Novel wideband VHF antenna for impulse GPR applications. VNUHCM Journal of Science and Technology Development. 17, 1 (Mar. 2014), 50-61. DOI:https://doi.org/https://doi.org/10.32508/stdj.v17i1.1294.