PY=(2011-2022) AND (CU=BULGARIA) AND (TS=("artificial intelligence") OR TS=("machine learning") OR TS=("neural network") OR TS=("big data") OR TS=("deep learning") OR TS=("pattern recognition") OR TS=("computer vision") OR TS=("image classification") OR TS=("reinforcement learning") OR TS=("support vector machines") OR TS=("recommender system") OR TS=("random forest") OR TS=("ensemble model") OR TS=("image processing") OR TS=("generative network") OR TS=("ai ethic") OR TS=("natural language processing") OR TS=("clustering algorithm") OR TS=("feature extraction") OR TS=("time series forecast") OR TS=("anomaly detection") OR TS=("identity fraud detection") OR TS=("dimensionality reduction") OR TS=("feature elicitation") OR TS=("chatbot") OR TS=("clustering") OR TS=("unsupervised learning") OR TS=("supervised learning") OR TS=("convolutional network") OR TS=("adversarial network"))