Table 1: Document type information of literature reports during 2001-2019.

Type of Article

Amount

Percentage

Article

4897

85.418%

Proceedings Paper

625

10.902%

Review

468

8.163%

Early Access

58

1.012%

Book Chapter

15

0.262%

Editorial Material

8

0.140%

Meeting Abstract

5

0.087%

Retracted Publication

3

0.052%

Correction

2

0.035%

Letter

1

0.017%