Table 4.

Inclusion of exclusion criteria.

Inclusion criteria

1. Select papers that are only presented/written in English language

2. Select the papers that are published during the period 2011–2020

3. Include papers whose page limit size is greater than or equal to 3

4. Select only those book chapters, workshop papers or conference papers that has relevant information to our main topic

5. Select only primary research articles for the analysis purposes

Exclusion criteria

1. Gray papers should be excluded

2. Exclude those papers that has no relevant information regarding the selected topic

3. Elimination of duplicate research papers