Some routing links
Getting Started with BIRD Routing Software
Modular, Pure Layer 3 Network for Kubernetes: The Implementation
BIRD
Intro to BGP with BIRD
cilium - Using BIRD to run BGP
FRRouting, OpenBSDd and BIRD
BGP Open Source Tools
Comparing Open Source BGP Stacks
Followup Measuring BGP Stacks Performance
Oreilly BGP in the Data Centre