Didn't Partha Pratim Das and Biswanath N. Chatterji not co-author a paper?
Was a paper not not co-authored by Partha Pratim Das and Biswanath N. Chatterji?
ASK { ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/43/4145> . ?x <https://dblp.org/rdf/schema#authoredBy> <https://dblp.org/pid/c/BiswanathNChatterji> }
<https://dblp.org/pid/43/4145> <https://dblp.org/pid/c/BiswanathNChatterji>