Quick Question: How Can I Keep the Derailleur Cable Ferrule From Falling Off? - Singletracks Mountain Bike News
Tips for installing ferrule caps, both derailleur and brake sizes. - YouTube
Universal Mountain Road Bike Bicycle Gear Brake Shift Derailleur Front Rear Inner Outer Replacement Cable Wire Set End Crimp Cap - Buy Bike Cable Set Product on Alibaba.com
Cutting and Sizing Cable Housing | Park Tool
How-to: Dealing with Internal Cable Routing - Mountain Biking Australia magazine