Table 3.

Top 20 most productive institutions.

rank	Institution	Country/region	Publications	Citations	Citations/publication
1	University of Hongkong	China	13	280	21.54
2	University of North Carolina	USA	13	229	17.62
3	University of IOWA	USA	13	187	14.38
4	National Institute of Education	Singapore	16	212	13.25
5	Nanyang Technological university	Singapore	17	218	12.82
6	State University System of Florida	USA	15	153	10.2
7	Education University of Hongkong	China	16	155	9.69
8	Islamic Azad University	Iran	22	195	8.86
9	Universitas Negeri Malang	Indonesia	22	161	7.32
10	University System of Georgia	USA	14	58	4.14
11	HSE University	Russia	12	47	3.92
12	University Technology Malaysia	Malaysia	16	49	3.06
13	Roma Tre University	Italy	13	37	2.85
14	Universitas Negeri Yogyakarta	Indonesia	38	97	2.55
15	Universitas Negerri Surabaya	Indonesia	12	30	2.5
16	Sebelas Maret University	Indonesia	26	58	2.23
17	Hacettepe University	Turkey	13	25	1.92
18	Kazan Federal University	Russia	13	25	1.92
19	Universitas Pendidikan	Indonesia	15	18	1.2
20	Universitas Negeri Padang	Indonesia	12	8	0.67