1. | Complete HS and SITC conversion and correspondence tables along with detailed note on its conversion methodology, http://unstats.un.org/unsd/trade/conversions/HS%20Correlation%20and%20Conversion%20tables.htm. |
2. | Core ICT Indicators, 2010 (2010), ITU, Geneva, www.itu.int/pub/D-IND-ICT_CORE-2010/en. |
3. | Correspondence HS 2007 – HS 2002; Correspondence HS 2002 – HS 2007; http://unstats.un.org/unsd/cr/registry/regot.asp?Lg=1. |
4. | CPC Ver. 2. Detailed structure and correspondences of CPC Ver. 2 subclasses to ISIC Rev.4 and HS 2007; http://unstats.un.org/unsd/cr/registry/cpc-2.asp. |
5. | Guide to measuring the information society (2009), OECD, www.oecd.org/dataoecd/25/52/43281062.pdf. |
6. | Handel zagraniczny – baza danych GUS, http://stat.gov.pl. |
7. | http://old.stat.gov.pl/gus/definicje_PLK_HTML.htm?id=POJ-6002.htm. |
8. | http://old.stat.gov.pl/gus/definicje_PLK_HTML.htm?id=POJ-6014.htm. |
9. | Nomenklatura Scalona na 2012 rok, Tablice korelacyjne CN 2011 – CN-2012.pdf, www.finanse.mf.gov.pl/clo/taryfa-celna/2012. |
10. | Rocznik statystyczny handlu zagranicznego, GUS, Warszawa. za lata 2005–2013. |
11. | Słownik innowacji – leksykon haseł, Portal innowacji, www.pi.gov.pl/parp/chapter_96055.asp?soid=256993FED9734DD0B31A4785E53F81F5. |
12. | UNCTADstat, http://unctadstat.unctad.org/wds/TableViewer/tableView.aspx. |
13. | Updating the Partnership Definition of ICT Goods from HS 2007 to HS 2012, http://new.unctad.org/templates/Page____970.aspx. |