| Issue Date | Title | Author(s) | Relation | scopus | WOS | Fulltext/Archive link |
| 2010 | Flavone O- and C-glycosides from Pothos chinensis (Araceae). | Iwashina, T.; Peng, C. -I; Kokubugata, G. | Bulletin of National Museum of National Science 36(1), 27-32 | | | |
| 2008 | Folilar flavonoids from two Begonia species in Japan | Iwashina, T.; Saito, Y.; Peng, C. -I; Yokota, M.; Kokubugata, G. | Bull. Natl. Mus. Nat. Sci., Ser. B 34(4), 175-181 | | | |
| 2009 | Taxonomic reconsideration of Disporum luzoniense (Liliaceae sensu lato) using falvonoid characters | Saito, Y.; Iwashina, T.; Peng, C. -I; Kokubugata, G. | Blumea 54: 59-62 | | | |
