In 1988, the Canadians Bruce Campbell, Gordon Walker and Stephensen Yang published their results on 6 years of spectroscopic observations of 23 solar stars with the Canada-France-Hawaii telescope (site mirror of CFHT).
Some of these stars, in particular Cephei and Eridani, were then suspected to contain planets. In 1992, one showed that in actuality, the variations observed were due to the chromospheric activity of the stars.
But this is not the end of the story....
In 2000, Artie Hatzes, from McDonald Observatory (Texas), and his colleagues finally argued that the variations of Eridani are probably due to the presence of a planet of 0,86 MJ and a period of 7 years! Their study was based on the analysis of six sets of data from four different telescopes.
Then in 2002, Hatzes et al. claimed that Cephei also had a planet (with a period of 2.5 years and a mass of 1,7 MJ).