The custom of such guhya or secretive Bhairava is really an oral tradition that is continuing from the guru disciple tradition. Their karmakand rituals and practices are magic formula, they're not created down but only learnt and practiced in Expert disciple custom. During the Kala Bhairav Ashtakam by Adi Shankracharya, https://rylanmhbvp.losblogos.com/29362008/the-5-second-trick-for-bhairav