Science - Quantum Physicists Dream Up Smallest Possible Refrigerator
Scientific American - A Bit Cold: Physicists Devise a Quantum Particle "Refrigerator"
Science 2.0 - World's Tiniest Refrigerator is 1 Qutrit
PhysicsWorld - The world's smallest fridge
Wired.com - Tiny fridge gets near absolute zero
NewScientist - World’s smallest fridge could chill quantum computers
MyScience - The smallest possible refrigerator
PhysicsWorld - The rise of quantum thermal machines