South Pole Science: Probing the Beginning of the Universe with
ESA Science & Technology - CMB Polarisation: Cosmic Microwave
What is the Cosmic Microwave Background? - BBC Sky at Night Magazine
CMB Experiments and Gravitational Waves
Cosmic microwave background - Wikipedia
Planck intermediate results - XXXVIII. E- and B-modes of dust
ESA Science & Technology - CMB Polarisation: Cosmic Microwave
So Mode It B by Brian Koberlein
The biggest questions about the Universe's beginning
Investigating the physics of the early Universe