Sources
Every source backing a fact on Peter Lonsdale's own page, deduplicated — the same source backing several facts appears once.
- https://dl.acm.org/doi/proceedings/10.1145/1377999 — https://dl.acm.org/doi/proceedings/10.1145/1377999
- https://link.springer.com/book/10.1007/b100594 — https://link.springer.com/book/10.1007/b100594