Context: CREATE TABLE table_12266757_1 (womens_singles VARCHAR, mens_doubles VARCHAR)
Question: Who was the womens singles winnerwhen the mens doubles were  stefan karlsson claes nordin , bk aura gbk?
Answer: SELECT womens_singles FROM table_12266757_1 WHERE mens_doubles = "Stefan Karlsson Claes Nordin , BK Aura GBK"