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Kundurjiev, T. and Salchev, Petko (2011): Technical efficiency of hospital psychiatric care in Bulgaria – assessment using Data Envelopment Analysis.
Salchev, Petko and Hristov, Nikolai (2010): Stress test of hospitals in Bulgaria - proposed methodology.
Salchev, Petko and Hristov, Nikolai and Georgieva, Lydia (2010): Possible approaches to benchmarking voluntary health insurance funds in Bulgaria.
