Versal designs filters to meet the requirements of regulatory and standards-setting organizations, worldwide. Links to some of these and other organizations are provided below.

BIA (German Institute for Safety at Work)
Canadian General Standards Board (CGSB)
Centers for Disease Control and Prevention (CDC)
Code of Federal Regulations
EPA (Environmental Protection Agency)
European Environment Agency
ILO-CIS International Occupational Safety and Health
Mine Safety & Health Administration (MSHA)
National Institute Of Occupational Safety & Health (NIOSH)
Occupational Safety and Health Administration (OSHA)
U.S. Consumer Product Safety Commission (CPSA)
UK Environment Agency
World Health Organization (WHO)

Trade & standards organizations
American Conference Of Governmental Industrial Hygienists (ACGIH)
American Industrial Hygiene Association (AIHA)
American National Standards Institute (ANSI) — ISO member for U.S.
Am. Soc. of Heating, Refrigerating & Air-Conditioning Engineers (ASHRAE)
American Society of Testing and Materials (ASTM)
Association française de normalisation (AFNOR) — ISO member for France
Association of Home Appliance Manufacturers AHAM
British Standards Institution — ISO member for UK
CSA International — Standards, ISO 9000 registrar, certification & testing
Deutsches Institut für Normung (DIN) — ISO member for Germany
EAA Working Group Aerosol Modelling
Europa EU Regulations
Gesellschaft für Aerosolforschung (GAeF) — Association for Aerosol Research (Germany)
International Confederation Contamination Control Societies (ICCCS)
International Society For Respiratory Protection (ISRP)
International Standardization Organization (ISO)
Japanese Industrial Standards Committee (JISC) — ISO member for Japan
Standards Council of Canada (SCC) — ISO member for Canada
Underwriters Laboratories (UL)
Verein Deutscher Ingenieure (VDI) — ISO member for Germany

Publications and references
Academy of Natural Sciences, The
Edinburgh Engineering Virtual Library (EEVL)
Environmental & Occupational Health & Sciences Institute (EOHSI)
Fraunhofer Institute Toxicology Aerosol
Gordon Research Conferences
Healthy Indoor Air for America's Homes project (Montana State Univ)
ICE (Internet Connections for Engineering) — The quintessential engineering link site
Medical Device Link
NASA Technical Reports Server (NTRS National Aeronautical & Space Administration)
Univ. of Florida Engineering Research Ctnr for Particle Science & Technology
Univ. of Minnesota Particle Technology & Environmental Research