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. 2021 Mar 4;26(4):4401–4431. doi: 10.1007/s10639-021-10457-8

Table 4.

Source type

Source Type Total Publications (TP) Percentage (%)
Journals 921 59.15
Conference Proceedings 457 29.35
Books 107 6.87
Book Series 72 4.62
Total 1557 100.00