P. Sam Johnson, “On Semiclosed Operators with Closed Range”, Canad. J. Appl. Math. 2 (2020), No. 2, 18-22.
P. Sam Johnson and S. Balaji, "Convergence of Operators with Closed Range", Khayyam J. Math. 5 (2019) No. 2, 132-138.
Mahesh Krishna and P. Sam Johnson, "Quotient Operators and the Open Mapping Theorem", Filomat 32:18 (2018), 6221-6227.
P. Sam Johnson and Vinoth A, "Product and Factorization of Hypo-EP Operators", Special Matrices 6 (2018), 376-382.
B. Parvathalu and P. Sam Johnson, "Construction of Mercedes-Benz Frame in Rn", International Journal of Applied and Computational Mathematics, December 2017, Issue 1 Supplement, 511-519.
G. Ramu and P. Sam Johnson, "Frames for Operators in Banach Spaces", Acta Mathematica Vietnamica, 42 (2017), 665-673.
Vinoth A and P. Sam Johnson, "On Sum and Restriction of Hypo-EP Operators", Funct. Anal. Approx. Comput. 9 (1) (2017), 37-41.
G. Ramu and P. Sam Johnson, "Frame Operators of K-frames", Boletin de la Sociedad Espanola de Matematica Aplicada, SeMA Journal (2016) 73 : 171-181.
P. Sam Johnson and G. Ramu, "Class of Bounded Operators associated with an Atomic System", Tamkang Journal of Mathematics, Vol.46, No.1, 85-90, March 2015.
P. Sam Johnson, “Multiplication Operators with Closed Range in Operator Algebras", Journal of Analysis and Number Theory, Vol. 1, No.1, 1-5, 2013.
P. Sam Johnson and S. Balaji, “On Semiclosed Subspaces of Hilbert Spaces", International Journal of Pure and Applied Mathematics, Vol. 79, No. 2, 2012, 249-258.
P. Sam Johnson and S. Balaji, “Hyers-Ulam Stability of Linear Operators in Frechet Spaces", Applied Mathematics and Information Sciences, Vol. 6, No.3, 525-528 (2012).
P. Sam Johnson and S. Balaji, “On Linear Operators with Closed Range", Journal of Applied Mathematics and Bioinformatics, Vol.1, No.2, 2011, 175-182.
P. Sam Johnson and C. Ganesa Moorthy, “Composition of Operators with Closed Range", The Journal of Analysis, 14(2006), 79-80.
C. Ganesa Moorthy and P. Sam Johnson, “Composition of Closed Range Operators", The Journal of Analysis, 12(2004), 165-169.
In Conference Proceedings
Vinoth A and P. Sam Johnson, “Factorization of EP Operators in Krein Spaces", Mathematical Analysis and Computing, Springer Proceedings in Mathematics and Statistics, 344, pp. 359-364, 2021. (Proceedings of the International Conference on Mathematical Analysis and Computing held at SSN College of Engineering, Chennai on December 23-24, 2019).
C. Ganesa Moorthy and P. Sam Johnson, “Closed Range - Multiplication Operators", Mathematical Analysis and Applications, Narosa Publishing House, pp 133-138, 2004 (Proceedings of the International Conference on Analysis and Discrete Structures held at Indian Institute of Technology, Kharagpur on December 22-24, 2002).
M. Rossafi, F. D. Nhari and P. Sam Johnson, “Controlled Continuous g-Frames and Their Duals in Hilbert Spaces”.
K. Mahesh Krishna, P. Sam Johnson and Asghar Rahimi, “Multipliers for Lipschitz p-Bessel Sequences in Metric Spaces”.
A. Senthil Thilak, Ayyanar K and P. Sam Johnson, “On the Construction and Properties of Frames Using Incidence Matrix of Graphs and Their Spectra”.
Athira Satheesh K and P. Sam Johnson, “Reverse Order Law for Closed Operators on Hilbert Spaces”.