1. Blackadar Bruce, K-theory for operator algebras, volume 5 of mathematical sciences research institute publications ( 1998) ( Cambridge: Cambridge University Press) second edition
2. Chakraborty Partha Sarathi and Pal Arupkumar, Characterization of spectral triples: A combinatorial approach, arXiv: math.OA/0305157 (2003)
3. Chakraborty Partha Sarathi and Pal Arupkumar, Equivariant spectral triples on the quantum SU(2) group, K-Theory 28 (2) (2003) 107–126
4. Chakraborty Partha Sarathi and Pal Arupkumar, Characterization of SU q (ℓ+1)-equivariant spectral triples for the odd dimensional quantum spheres, J. Reine Angew. Math. 623 (2008) 25–42
5. Chakraborty Partha Sarathi and Sundar S, K-groups of the quantum homogeneous space SU q (n)/SU q (n−2), Pacific J. Math. 252 (2) (2011) 275–292