Lie groups

Elements of Mathematics: General Topology. Chapters 1-4

Nicolas Bourbaki

Lie algebras and Lie groups: 1964 lectures given at Harvard University

Jean-Pierre Serre.

Algebraic methods in quantum chemistry and physics

Francisco M. Fernández, Eduardo A. Castro.

Tree Lattices (Progress in Mathematics)

L. Carbone, G. Rosenberg, J. Tits, Alexander Lubotzky, A. Lunotzky, H. Bass, Hyman Bass

Applications of Lie groups to differential equations

Peter J. Olver.

Representation theory: a first course

William Fulton, Joe Harris.

Lie groups, Lie algebras, and their representations

V.S. Varadarajan.

Hypercomplex analysis: new perspectives and applications

Swanhild Bernstein, Uwe Kähler, Irene Sabadini, Frank Sommen, editors

Holomorphy and convexity in Lie theory

by Karl-Hermann Neeb.

Elements de mathematique.

N. Bourbaki.