S. Buterin, “Functional-differential operators on geometrical graphs with global delay and inverse spectral problems”, Results Math., 78:3 (2023), 79
Nebojsa Djuric, Biljana Vojvodic, “Inverse problem for Dirac operators with a constant delay less than half the length of the interval”, Appl Anal Discrete Math, 17:1 (2023), 249
Sergey Buterin, “On Recovering Sturm–Liouville-Type Operators with Global Delay on Graphs from Two Spectra”, Mathematics, 11:12 (2023), 2688
S. Buterin, N. Djurić, “Inverse problems for Dirac operators with constant delay: uniqueness, characterization, uniform stability”, Lobachevskii J. Math., 43:6 (2022), 1492