James A. Mullen. The Electronic Countermeasures Problem for Extremely Low Frequency (ELF) Communications. IEEE Transactions on Communications, 22(4):496-503, 1974. [doi]
@article{Mullen74,
title = {The Electronic Countermeasures Problem for Extremely Low Frequency (ELF) Communications},
author = {James A. Mullen},
year = {1974},
doi = {10.1109/TCOM.1974.1092216},
url = {https://doi.org/10.1109/TCOM.1974.1092216},
researchr = {https://researchr.org/publication/Mullen74},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Communications},
volume = {22},
number = {4},
pages = {496-503},
}