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Additional information
Institute of Physics, Academy of Sciences of the Azerbaidzhan SSR, Baku. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 52, No. 3, pp. 393–404, September, 1982.
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Rasizade, O.S. Bifurcation of point sources and contour sources of nonlinear fields. Theor Math Phys 52, 874–882 (1982). https://doi.org/10.1007/BF01038082
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DOI: https://doi.org/10.1007/BF01038082