@Article{nhess-4-513-2004,
AUTHOR = {Surkov, V. V. and Molchanov, O. A. and Hayakawa, M.},
TITLE = {A direction finding technique for the ULF electromagnetic source},
JOURNAL = {Natural Hazards and Earth System Science},
VOLUME = {4},
YEAR = {2004},
NUMBER = {4},
PAGES = {513--517},
URL = {http://www.nat-hazards-earth-syst-sci.net/4/513/2004/},
DOI = {10.5194/nhess-4-513-2004}
}