An improved prediction of sunspot maximum by Vondrak smoothing method
2010 ◽
Vol 22
(4)
◽
pp. 676-681
1990 ◽
2009 ◽
Vol 179
(1)
◽
pp. 131-141
◽
1965 ◽
Vol 27
(2)
◽
pp. 197-209
◽
1966 ◽
Vol 28
(12)
◽
pp. 1183-1194
◽
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