Kundalini Yoga and Advaita
The following articles are by Pieter, who is a Kundalini Yoga teacher in Thailand and was one of the first students of Yogi Bhajan.
A Proper Understanding the Active/Passive Aspect of Kundalini Yoga Practice
What is Yoga? What is Kundalini Yoga?
BASIC KUNDALINI YOGA BREATHING
Breath of Fire (Bastrika and Kapalabati) (*)
Pieter gives the following course in Thailand with focus on the non-dual teachings: