“…The works shown in TABLE 1 cover the following aspects of the examined problem: systematic review or how the literature was collected [27], [31], [32]; cyberbullying definition [32], [33], [35], [39]; cyberbullying types [25], [26], [29]; datasets [25], [28], [32]; feature selection [27], [35], [36]; model selection [26], [27], [31]; and evaluation metrics [26], [30], [35]. However, only few are comprehensive [26], [30]. There are some important aspects that are rarely covered in the literature, like data annotation [31] and data preprocessing [27].…”