A systematic review of automated pre-processing, feature extraction and classification of cardiotocography oleh Shahad Al-yousif, Ariep Jaenul, Wisam Al-Dayyeni, Ah Alamoodi, Ihab Jabori, Nooritawati Md Tahir, Ali Amer Ahmed Alrawi, Zafer Cömert, Nael A. Al-shareefi, Abbadullah H. Saleh