Question: Who won the Mens Singles when the Mixed doubles went to Stellan Mohlin Kerstin Ståhl , Aik?
Schema: create table table_12266757_1 (mens_singles varchar, mixed_doubles varchar, PRIMARY KEY (mens_singles))
SQL: select mens_singles from table_12266757_1 where mixed_doubles = "stellan mohlin kerstin ståhl , aik"