1. Albrecht, D., Duong, X., McIntosh, A.: Operator theory and harmonic analysis. In: Instructional Workshop on Analysis and Geometry, Part III (Canberra, 1995), Proc. Centre Math. Appl. Austral. Nat. Univ., vol. 34, pp. 77–136. Austral. Nat. Univ., Canberra (1996). MR1394696 (97e:47001)
2. Atiyah, M .F., Singer, I .M.: Index theory for skew-adjoint Fredholm operators. Inst. Hautes Études Sci. Publ. Math. 37, 5–26 (1969). MR 0285033
3. Auscher, P., Hofmann, S., Lacey, M., McIntosh, A., Tchamitchian, P.: The solution of the Kato square root problem for second order elliptic operators on $${\mathbb{R}}^{n}$$, Ann. Math 156(2), 633–654 (2002). (2)
4. Axelsson, A., Keith, S., McIntosh, A.: Quadratic estimates and functional calculi of perturbed Dirac operators. Invent. Math. 163(3), 455–497 (2006)
5. Bandara, L.: Density problems on vector bundles and manifolds. Proc. Am. Math. Soc 142(8), 2683–2695 (2014). MR 3209324