Sombatsompop N, Premkamolnetr N, Ittiritmeechai S, Markpin T, Ratchatahirun P, Yochai W, Wongkaew C & Lee IB (2011) Viewpoints on Synergizing ASEAN Academic Visibilities through Research Collaboration and Establishment of ASEAN Citation Index Database Asia Pacific Viewpoint, 52 (2): 207-218.
JIF = 0.729

Sombatsompop N, Markpin T, Ratchatahirun P, Yochai W, Ittiritmeechai S, Premkamolnetr N, & Wongkaew C (2011) Research Productivity, Impact and Excellence of ASEAN Countries and Universities using Standard Bibliometric Analysis: A Case Study of Energy and Fuel Field Malaysian Journal of Library & Information Science, 16 (1): 35-46.
JIF = 0.353

Sombatsompop N, Markpin T, Ratchatahirun P, Yochai W, Wongkaew C & Premkamolnetr N (2010) 10) Research Performance Evaluations of Thailand National Research Universities during 2007-2009 Information Development, 26 (4): 303-313.
JIF = 0.143

Sombatsompop N, Markpin T, Wimolmala E, Ratchatahirun P, Premkamolnetr N, Boonradsamee B & Yochai W (2009) Relationship on Research Publications and Productivity-Export Volumes for Natural Rubber Scientometrics, 81 (2): 393-405.
JIF = 1.905

Buranathiti T, Premkamolnetr N, Markpin T, Ratchatahirun P, Yochai W & Sombatsompop N (2009) Redistributed Random Sampling Method for Categorizing Materials Research Publication from SCI Database: Metallurgy and Polymer Subfields - Scientometrics, 78 (1): 13-21.
JIF = 1.905

Markpin T , Boonradsamee B, Ruksinsut K, Yochai W, Premkamolnetr N, Ratchatahirun P & Sombatsompop N (2008) Article-Count Impact Factor of Materials Science Journals in SCI Database - Scientometrics , 75(2): 251-261.
JIF = 1.905

Sombatsompop N, Markpin T, Buranathiti T, Ratchatahirun P, Metheenukul T, Premkamolnetr N & Yochai W  (2007) Categorization and Trend of Materials Science Research from Science Citation Index (SCI) Database: A Case Study of Ceramics, Metallurgy, and Polymer Subfields - Scientometrics, 71(2): 283-302.
JIF = 1.905

Sombatsompop N, Kositchaiyong A, Markpin T & Inrit S (2006) Scientific Evaluations of Citation Quality of International Research Articles in the SCI Database: Thailand Case Study - Scientometrics, 66 (3): 521-535.
JIF = 1.905

Sombatsompop N, Markpin T, Yochai W & Saechiew M (2005) An Evaluation of Research Performance for Different Subject Categories using Impact Factor Point Average (IFPA) Index: Thailand Case Study - Scientometrics, 65 (3): 293-305.
JIF = 1.905

Sombatsompop N & Markpin T (2005) Making an Equality of ISI Impact Factors for Different Subject Fields, Journal of the American Society for Information Science and Technology, 56 (7): 676-683.
JIF = 2.137

Sombatsompop N, Premkamolnetr N & Markpin T (2004) A Modified Method for Calculating the Impact Factors of Journals in ISI Journal Citation Reports: Polymer Science Category in 1997-2001- Scientometrics, 60 (2): 217-235.
JIF = 1.905

Sombatsompop N, Ratchatahirun P, Surathanasakul V, Premkamolnetr N & Markpin T (2002) A Citation Report of Thai Academic Journals During 1996-2000 - Scientometrics, 55 (3): 445-462.
JIF = 1.905