інтернет-адреса сторінки:
http://jnas.nbuv.gov.ua/article/UJRN-0000696825
Ukrainian journal of physics 
А - 2018 /
Випуск (2014, Vol. 59, № 11)
Lelyakov O. P., Karpenko A. S., Babadzhan R.-D. O.
Dynamics of a non-rotating test null string in the gravitational field of a closed "thick" null string radially expanding or collapsing in the plane z = 0
Cite:
Lelyakov, O. P., Karpenko, A. S., Babadzhan, R.-D. O. (2014). Dynamics of a non-rotating test null string in the gravitational field of a closed "thick" null string radially expanding or collapsing in the plane z = 0. Ukrainian journal of physics, 59 (11), 1114-1125. http://jnas.nbuv.gov.ua/article/UJRN-0000696825
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