Khachatryan Kh.A. Petrosyan H.S., “On Bounded Solutions of a Class of Nonlinear Integral Equations in the Plane and the Urysohn Equation in a Quadrant of the Plane”, Ukr. Math. J., 73:5 (2021), 811–829
Kh. A. Khachatryan, A. S. Petrosyan, “O postroenii summiruemogo resheniya odnogo klassa nelineinykh integralnykh uravnenii tipa Gammershteina - Nemytskogo na vsei pryamoi”, Tr. IMM UrO RAN, 26, no. 2, 2020, 278–287
Kh. A. Khachatryan, “Existence and uniqueness of solution of a certain boundary-value problem for a convolution integral equation with monotone non-linearity”, Izv. Math., 84:4 (2020), 807–815
Khachatryan Kh.A. Petrosyan H.S., “Solvability of a Nonlinear Problem in Open-Closed P-Adic String Theory”, Differ. Equ., 56:10 (2020), 1371–1378
Khachatryan Kh.A. Andriyan S.M., “On Solvability of One Class of Nonlinear Integral Equations on Whole Line With Two Monotone Nonlinearities”, P-Adic Numbers Ultrametric Anal. Appl., 12:4 (2020), 259–275
Kh. A. Khachatryan, A. S. Petrosyan, “O kachestvennykh svoistvakh resheniya odnoi nelineinoi granichnoi zadachi v dinamicheskoi teorii $p$-adicheskikh strun”, Vestn. S.-Peterburg. un-ta. Ser. 10. Prikl. matem. Inform. Prots. upr., 16:4 (2020), 423–436
Kh. A. Khachatryan, “Solvability of some nonlinear boundary value problems for singular integral equations of convolution type”, Trans. Moscow Math. Soc., 81:1 (2020), 1–31
A. Kh. Khachatryan, Kh. A. Khachatryan, “A uniqueness theorem for a nonlinear singular integral equation arising in $p$-adic string theory”, Uch. zapiski EGU, ser. Fizika i Matematika, 53:1 (2019), 17–22
Kh. A. Khachatryan, “Solvability of some classes of nonlinear singular boundary value problems in the theory of $p$-adic open–closed strings”, Theoret. and Math. Phys., 200:1 (2016), 1015–1025
Khachatryan A.Kh. Khachatryan Kh.A., “Solvability of a Class of Nonlinear Pseudo-Differential Equations in R-N”, P-Adic Numbers Ultrametric Anal. Appl., 10:2 (2018), 90–99
Khachatryan Kh.A. Terjyan Ts.E. Avetisyan M.H., “A One-Parameter Family of Bounded Solutions For a System of Nonlinear Integral Equations on the Whole Line”, J. Contemp. Math. Anal.-Armen. Aca., 53:4 (2018), 201–211
Kh. A. Khachatryan, A. S. Petrosyan, M. O. Avetisyan, “Voprosy razreshimosti odnogo klassa nelineinykh integralnykh uravnenii tipa svertki v $\mathbb {R}^n$”, Tr. IMM UrO RAN, 24, no. 3, 2018, 247–262
Kh. A. Khachatryan, S. M. Andriyan, A. A. Sisakyan, “On the solvability of a class of boundary value problems for systems of the integral equations with power nonlinearity on the whole axis”, Bul. Acad. Ştiinţe Repub. Mold. Mat., 2018, no. 2, 54–73
Kh. A. Khachatryan, “On the solvability of a boundary value problem in $ p$-adic string theory”, Trans. Moscow Math. Soc., 2018, 101–115
S. M. Andriyan, A. K. Kroyan, Kh. A. Khachatryan, “On solvability of class of nonlinear integral equations in $p$-adic string theory”, Ufa Math. J., 10:4 (2018), 12–23
Kh. A. Khachatryan, A. K. Kroyan, “The existence of odd solution for one boundary-value problem with power nonlinearity”, J. Math. Sci., 253:3 (2021), 382–390
Khachatryan Kh.A., “On Solvability of One Class of Nonlinear Integral Equations on Whole Line With a Weak Singularity At Zero”, P-Adic Numbers Ultrametric Anal. Appl., 9:4 (2017), 292–305
Dragovich B. Khrennikov A.Yu. Kozyrev S.V. Volovich I.V. Zelenov E.I., “P-Adic Mathematical Physics: the First 30 Years”, P-Adic Numbers Ultrametric Anal. Appl., 9:2 (2017), 87–121
Calcagni G., “String Theory”: G. Calcagni, Classical and Quantum Cosmology, Graduate Texts in Physics, Springer International Publishing Ag, 2017, 625–700
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