Former Columbus Blue Jackets defenseman Radek Martinek, current an unrestricted free agent in the NHL, also signed with Mountfield earlier in the day.
Ference, 33, registered six goals and 18 assists for 24 points, along with 46 penalty minutes, in 72 games with the Bruins last season.
The Edmonton native is the sixth Canadian-born NHLer to sign overseas, joining Logan Couture, Joe Thornton, Rick Nash and Jason Spezza, all of whom signed in Switzerland's National League A, and Jason Demers, who signed in the SM-Liiga in Finland.
