Enev, Rostislav, Fillip Abedinov, Neda Bakalova, Margarita Atanasova, Nezabravka Chilingirova, and Plamen Krastev. 2023. “Stroke Volume Variation Is a Good Predictor of Fluid Responsiveness in Cardiac Surgery Patients With Implanted Intra-Aortic Balloon Pump”. Proceedings of the Bulgarian Academy of Sciences 76 (4). Sofia, Bulgaria:612-21. https://doi.org/10.7546/CRABS.2023.04.14.