**In international peer-reviewed journals (only):**

- U. V. Le: The innovation among Southeast Asian countries (submitted)

- Tuan V. Nguyen, Thao P. Ho-Le, Ut V. Le; International collaboration in scientific research in Vietnam: an analysis of patterns and impact;
Vol. 110, Issue 2, pp. 1035–1051 [ISI-SSCI].*Scientometrics,* - Pascali, E.; Lê, U.V.: On the zeros of the solutions of some class of differential equations;
*Analysis, Geometry and Number Theory*(to appear) - Ut V. Le, E. Pascali: A model for the problem of the cooperation/competition between infinite continuous species;
*Ricerche di Matematica*,**62**(2013), 139-153 [MR3057391, SJR] - Lê, U.V.: On a low-frequency asymptotic expansion of weak solutions of a semilinear wave equation with a boundary-like anti-periodic condition.
*Manuscripta Math.***138**(2012), 439-461. [ MR2916321, ISI] - Lê, U.V.: A semi-linear wave equation with space-time dependent coefficients and a memory boundary-like antiperiodic condition: a low-frequency asymptotic expansion.
*J. Math. Phys.***52,**023510 (2011), 23 pp. [MR2798408, ISI] - Lê, U.V.: A semi-linear wave equation with space-time dependent coefficients and a memory boundary-like antiperiodic condition: regularity and stability.
*J. Math. Phys.***51**(2010) 103504, 28 pp [MR2761318, ISI] - Lê, U.V.: A general mathematical model from the collision between a free-fall hammer of a pile-driver and an elastic pile: continuous dependence and low-frequency asymptotic expansion.
*Nonlinear Anal. Real World Appl.***12**(2011), 702–722. [MR2729055, ISI] - Lê, U.V.: Regularity of the solution of a nonlinear wave equation.
*Commun. Pure Appl. Anal.***9**(2010) 1099 – 1115. [MR2610264, ISI] - Harjulehto, P.; Hasto, P.; Lê, U.V.; Nuortio, M.: Overview of differential equations with non-standard growth.
*Nonlinear Anal.***72**(2010) 4551 – 4574. [MR2639204, ISI] - Lê, U.V.: A general mathematical model from the collision between a free-fall hammer of a pile-driver and an elastic pile.
*Nonlinear Anal. Real World Appl.***11**(2010) 2930 – 2956. [MR2661957, ISI] - Lê, U.V.; Pascali, E.: A contraction procedure for the unique solvability of a semilinear wave equation associated with a full nonlinear damping-source term and a linear integral equation at the boundary.
*Mem. Differential Equations and Math. Phys.**49*(2010) 139 – 150. [MR2648175] - Lê, U.V.: Contraction-Galerkin method for a semi-linear wave equation.
*Commun. Pure Appl. Anal.**9*(2010) 141-160. [MR2556750, ISI] - Lê, U.V.; Nguyên, L.T.T.; Pascali, E.; Sanatpour, A.H.: Extended solutions of a system of nonlinear integro-differential equations.
*Le Matematiche***64**(2009) 3 – 16. [MR2799999] - Lê, U.V.; Pascali, E.: Existence theorems for systems of nonlinear integro-differential equations.
*Ric. Mat.***58**(2009) 91-101. [MR2507795, SJR] - Lê, U.V.: Global unique solvability and decays for a wave equation associated with an integral equation.
*Proc. A. Razmadze Math. Inst.***149**(2009) 35-53. [MR2517750] - Lê, U.V.: On a semi-linear wave equation associated with memory conditions at the boundaries: Stability and asymptotic expansion.
*Dyn. Partial Differ. Equ.***5**(2008) 329-347. [MR2489956, ISI] - Lê, U.V.: On a semi-linear wave equation associated with memory conditions at the boundaries: Unique existence and regularity.
*Dyn. Partial Differ. Equ.***5**(2008) 313-327. [MR2489955, ISI] - Lê, U.V.: The well-posedness of a semilinear wave equation associated with a linear integral equation at the boundary.
*Mem. Differential Equations and Math. Phys.***44**(2008) 69-88. [MR2527036] - Lê, U.V.: A contraction procedure for the unique solvability of a semilinear wave equation associated with a linear integral equation at the boundary.
*JP J. Fixed Point Theory and Appl.***3**(2008) 49 – 61. [MR2466722] - Lê, U. V.; Nguyên, L.T.T.: An existence theorem for a system of self-referred and hereditary differential equations.
*Electron. J. Differential Equations***51**(2008), 7 pp. [MR2392955, ISI] - Pascali, E.; Lê, U.V.: An existence theorem for self-referred and hereditary differential equations.
*Adv. Differ. Equ. Control Process.***1**(2008) 25 – 32. [MR2441709] - Nguyen, L.T.; Lê, U.V.; Nguyen, T.T.T.: A shock problem involving a linear viscoelastic bar.
*Nonlinear Anal.***63**(2005) 198-224. [MR2165496, ISI]

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