One of the key datasets of the recent BICEP2 results is the B mode power spectrum shown below. The existence of these B modes implies the existence of gravitational waves prior to inflation. My
Power Spectrum
Cosmology II: Observables
Cosmological Parameters - an overview
CMB Introduction
Power Spectra & Correlation Functions - Galaxies & Cosmology 2015
DES Year 3 Cosmology Results: Papers - The Dark Energy Survey
The Standard Model of Cosmology: A Skeptic's Guide - D. Scott
E-and B-mode power spectra for a tensor-to-scalar ratio saturating
Cosmic Microwave Background Anisotropies - W. Hu & S. Dodelson
Power Spectrum
A Measurement of the Degree-scale CMB B-mode Angular Power
Power Spectrum
Inflation: Theory and Observations - CERN Document Server
ESA Science & Technology - CMB Polarisation mission - sensitivity
CMB spectra and likelihood code - Planck Legacy Archive Wiki