Information about doing business in Singapore
Singapore's Business Community - www.enterpriseone.gov.sg
Accounting and Regulatory Authority - www.acra.gov.sg
Business Service Portal - www.bizfile.gov.sg
International Enterprise - www.iesingapore.gov.sg
Singapore Government Procurement Portal - www.gebiz.gov.sg
World Bank Group - Doing Business in Singapore - www.doingbusiness.org/data/exploreeconomies/singapore
Information about doing business in Bulgaria
InvestBulgaria Agency - http://investbg.government.bg
AmCham Doing Business in Bulgaria - http://www.amcham.bg/business_resources/doing_business_in_bulgaria.aspx
The World Bank - Bulgaria - http://www.worldbank.org/en/country/bulgaria