[1] V. Ambarzumjan, Uber eine Frage der Eigenwerttheorie, Zeitschrift
für Physik 53(9-10) (1929), 690-695.
DOI: https://doi.org/10.1007/BF01330827
[2] G. Borg, Eine Eine Umkehrung der Sturm-Liouvilleschen
eigenwertaufgabe: Bestimmung der differentialgleichung durch die
eigenwerte, Acta Mathematica 78 (1946), 1-96.
DOI: https://doi.org/10.1007/BF02421600
[3] G. Freiling and V. Yurko, Inverse problems for Sturm-Liouville
differential operators with a constant delay, Applied Mathematics
Letters 25(11) (2012), 1999-2004.
DOI: https://doi.org/10.1016/j.aml.2012.03.026
[4] M. Pikula and N. Mihaljević, The inverse Sturm-Liouville type
problem with changeable delay, Mathematica Montisnigri 16 (2003),
41-68.
[5] I. Kalćo, Construction solutions differential operator type
Sturm-Liouville border task with linear delay, Bulletin of the
International Mathematical Virtual Institute 4(2) (2014), 123-128.
[6] M. Pikula, I. Kalćo and F. Destović, Direct and inverse
spectral assignment for the operator Sturm-Liouville type with linear
delay, Mathematica Montisnigri 37 (2016), 91-104.
[7] I. Kalćo, M. Pikula and F. Destović, Direct and inverse
task for the operator Sturm-Liouville type with linear delay, Journal
of Mathematical Sciences: Advances and Applications 44 (2017),
51-71.
DOI: https://doi.org/10.18642/jmsaa_7100121759