Roy's studies have been documented by way of a number of articles and the online article repository of the Indian Academy of Sciences has listed 106 of them. Besides, he has published four more books other than his PhD thesis viz. Theory of Lepton-Hadron Processes at High Energies: Partons, Scale Invariance and Light-Cone Physics, Supersymmetry and Supergravity Nonperturbative QCD Phenomenology of the standard model and beyond, and Theory and Phenomenology of Sparticles: An Account of Four-Dimensional N=1 Supersymmetry in High Energy Physics. Roy has also contributed chapters to books published by others and has mentored doctoral and post-doctoral scholars. The lecture series or invited talks delivered by him included Linear collider signals of anomaly-mediated supersymmetry breaking, at the physics working group meeting of American Linear Collider Physics in 2004, The wonderful world of neutrinos at S.N. Bose National Centre for Basic Sciences in 2004, Measuring the deviation from maximal mixing of atmospheric neutrinos at INO, at PANIC 05 in Santa Fe, New Mexico, Event-shape of dileptons plus missing energy at a linear collider as a SUSY/ADD discriminant at Indian Institute of Science in 2006, Symmetries of nonhierarchical neutrinos from high to low scales at IWTHEP-2007, and Dark Energy of the Universe at Indian Institute of Science Education and Research, Pune in 2015.