NON-COMPACT QUANTUM GRAPHS WITH SUMMABLE MATRIX POTENTIALS ArticleGranovskyi Y., Malamud M., Neidhardt H.Annales Henri Poincare. Vol. 22. 2021.
QUANTUM GRAPHS WITH SUMMABLE MATRIX POTENTIALS ArticleGranovskyi Y.I., Malamud M.M., Neidhardt H.Doklady Mathematics. Vol. 100. 2019. P.. 405-410