Fizika Tverdogo Tela, 1989 Volume 31, Issue 6,Pages 177–180(Mi ftt5421)
X-ray $K$-line shift and electronic structure of $\mathrm{Y},\mathrm{Ba}$ and $\mathrm{La}$ in the high-$T_{c}$ superconductors $\mathrm{La}_{2-x}(\mathrm{Sr},\mathrm{Ba})_{x}\mathrm{CuO}_{4}$ and $\mathrm{YBa}_{2}\mathrm{Cu}_{3}\mathrm{O}_{7}$