Geodesic
On the deficiency index of second-order matrix differential operators with rapidly oscillating coefficients
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (2000), pp. 48-53.

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V. P. Serebryakov. On the deficiency index of second-order matrix differential operators with rapidly oscillating coefficients. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (2000), pp. 48-53. https://geodesic-test.mathdoc.fr/item/IVM_2000_3_a8/

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