Re: Completeness, Orthonormality and Orthogonality in QM

http://depts.washington.edu/jrphys/ph248A11/QM3.pdf

https://homepage.univie.ac.at/reinhold.bertlmann/pdfs/T2_Skript_Chapter_3.pdf

https://pages.uoregon.edu/soper/QuantumMechanics2006/vectors.pdf

https://web.njit.edu/~venanzi/chem658/lecture/notes_Ch7.pdf

http://www.physics.usu.edu/Wheeler/QuantumMechanics/Quantum%20states%20as%20vectors.pdf

http://tid.uio.no/~finnr/notes/chap10.pdf

http://vergil.chemistry.gatech.edu/notes/quantrev/node19.html

http://www.matfys.lth.se/education/quantinfo/QIlect1.pdf