The Atomic Loans Technical Paper is a technical outline of the Atomic Loans Protocol, originally by Matthew Black and TingWei Liu, currently maintained by Matthew Black and Tony Cai.
The paper comes as a latex file atomic_loans.tex as well as styling files llncs.cls and splncs04.bst long with diagram pictures detailing the construction of an Atomic Loans tal_design_top.eps, tal_design_middle.eps, tal_design_bottom.eps. You can view this entire file in tal_construction.svg. The latest version is generally available as a PDF at https://arxiv.org/pdf/1901.05117.pdf.