Fizetési mérleg

http://www.mnb.hu/engine.aspx?page=mnbhu_fizetesi_merleg

Purchasing Power Parities (PPP)

http://www.oecd.org/department/0,3355,en_2649_34357_1_1_1_1_1,00.html

Silk Road

http://www.unwto.org/silk_road/silkroad/en/silk_road.php?op=0

TTRA Chapters

http://ttra.com/chapters.php

Medical tourism

http://en.wikipedia.org/wiki/Medical_tourism#Europe