Dapper, a Large-Scale Distributed Systems Tracing Infrastructure, Benjamin H. Sigelman, Luiz André Barroso, Mike Burrows, Pat Stephenson, Manoj Plakal, Donald Beaver, Saul Jaspan, Chandan Shanbhag, 2010Google Technical Report dapper-2010-1 (Google Inc.) - A foundational paper describing Google's distributed tracing system, essential for understanding component-level latency and request flow in distributed architectures.