Labsker, L. G. “On the Weak Convergence of Sequences of Linear Functionals: (in Russian)”.
Anal. Numér. Théor. Approx.
, vol. 14, no. 1, Feb. 1985, pp. 33-57,
https://ictp.acad.ro/jnaat/journal/article/view/1985-vol14-no1-art3
.