Meditation & Kriya Yoga
Sushumna Kriya Yoga: Live Meditation & Presentation
sushumna kriya yoga
Kriya Yoga Pranayama
Enlightenment through Sushumna Kriya Yoga
Kriya Yoga: Spiritual Progress Through Kundalini Awakening — The Yogi Press
The asanas, pranayama, kriya yoga, bandhas, and mudras were practiced and perfected by them.
This is not based on any certification process.