The critical points of linear combinations
of harmonic functions
1948 ◽
Vol 54
(2)
◽
pp. 196-206
1948 ◽
Vol 34
(3)
◽
pp. 111-119
1948 ◽
Vol 54
(2)
◽
pp. 191-196
◽
2019 ◽
Vol 12
(07)
◽
pp. 1950087
1980 ◽
Vol 261
(1)
◽
pp. 137-137
1951 ◽
Vol 57
(3)
◽
pp. 194-205
1993 ◽
Vol 16
(2)
◽
pp. 267-276
◽
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