דברי הספד לרב חיים מאיר דרוקמן ז"ל מפי הרב שאול דוד בוצ'קו
Rav Bochko wrote an article justifying coed as לכתחילה but Rav Drukman refused to give his haskama b/c he believed that Bnei Akiva being mixed is בדיעבד [unlike what I wrote in a recent post - so I stand corrected!!].