Still difficult to conclude
Thank you OverRun.
After all of this discussion, I think we can conclude that min runway width for 737 can be 30 meters only with some limitations. If we do not want any limitations then min runway width for 737 becomes 45 meters.
However, I still could not get any response regarding AFM and OM supplements for "narrow runway" operations. I wonder if there are any pilots in this community, who have seen such supplemental pages in AFM and OM about "narrow runway" operations of 737.