VI. CONCLUSION VII. ACKNOWLEDGMENTS 34 We have presented a systematic evaluation of the relativistic nuclear recoil effect in Li-like ions. The recoil correction within the leading relativistic approximation was calculated with many-electron wave functions in order to take into account the electron correlation effect. It relies on the large-scale CI-DFS method. The higher-order relativistic recoil correction were also taken into account. The results obtained are used to evaluate the 2 p$_{j}$ − 2 s transition energies. They can also be employed to get the isotope shifts in Li-like ions. A systematic QED treatment of the electron correlation for the 2 p$_{j}$ − 2 s transitions in Li- like ions was presented. The rigorous QED calculation of the one- and two-photon exchange contributions is combined with the electron correlations of third and higher orders, that have been evaluated within the Breit approximation employing the CI-DFS method. The complete gauge invariant sets of the screened one-loop QED corrections have been rigorously evaluated. Different local potentials were used as the zeroth-order approximation, namely, the Coulomb, core-Hartree, and Kohn-Sham potentials. The screened QED contributions to the ionization energies of the 2 s , 2 p$_{1}$$_{/}$$_{2}$ , and 2 p$_{3}$$_{/}$$_{2}$ states as well as to the 2 p$_{j}$ − 2 s transition energies are presented for Li-like ions in the range Z = 10 − 92. Finally, we have compiled all available theoretical contributions to the 2 p$_{j}$ − 2 s transition energies in middle- Z Li-like ions for Z = 10 − 60. Due to the more elaborative evaluations of the electron-electron interaction in the relativistic recoil and QED contributions we have substantially reduced the total uncertainty of the theoretical predictions. A good agreement with the experimental results has been found. We thank O. Zherebtsov for providing us with his unpublished results. Valuable com- munications with V. Yerokhin are gratefully acknowledged. The authors acknowledge the support by RFBR (Grant No. 07-02-00126-a), GSI, DFG (Grant No. 436RUS113/950/0-1), and by the Ministry of Education and Science of Russian Federation (Program for Devel- opment of Scientific Potential of High School, Grant No. 2.1.1/1136; Program ”Scientific and pedagogical specialists for innovative Russia”, Grant No. P1334). Y.S.K. acknowledges support by the Dynasty Foundation and DAAD. The work of A.N.A. is supported by the