1. Lady Chatterley's Lovers 1928
2. www.who.int/water_sanitation_health/publications/glaas_report_2012/en/
3. 12 4 13 2 2 12 3 http://goldbook.iupac.org/I03351.html
4. 3 14 7 0 1 12 6 3 1 - 3
5. Biologically important isotope hybrid compounds in nmr: 1H Fourier transform nmr at unnatural abundance