Remark 3.6. The results of Section 3 (in particular, the Eilenberg–Steenrod axioms for factorization homology) only require that the monoidal structure distributes over sifted colimits; these results are established in this generality, though with a smooth structure present, in §2 of [AFT2]. However, the calculations of Section 4 onwards require the monoidal structure to distribute over all colimits, so for simplicity of exposition we enforce this stronger hypothesis throughout.
Original source: arXiv:1206.5522v6