Viscous Flow text book by F M white is best

Dear Praveen,

Here are some interesting documents where you will find appropriate references.

https://turbmodels.larc.nasa.gov/wilcox.html

https://www.cfd-online.com/Wiki/Wilcox%27s_k-omega_model

http://www.leb.eei.uni-erlangen.de/winterakademie/2011/report/content/course01/pdf/0112.pdf

http://d-scholarship.pitt.edu/10241/1/cdsp-new.pdf

http://www.ewp.rpi.edu/hartford/~ernesto/F2013/ET/MaterialsforStudents/Slayden/Celik-Intro-to-TurbulenceModeling.pdf

With my best regards

Prof. Bachir ACHOUR

Mohammadi, Bijan, and Olivier Pironneau. "Analysis of the k-epsilon turbulence model." (1993).

http://d-scholarship.pitt.edu/10241/1/cdsp-new.pdf

Look at the Wilcox book: Turbulence Modeling for CFD. There is a special section to k-omega!

I  too suggest Wilcox

"A First course in Turbulence" by Tennekes and Lumley is a classic that provides real physical insight.