1. Bé MM, Christé V, Dulieu C, Browne E, Chechev V, Kuzmenko N, Kondev F, Luca A, Galán M, Pearce A, Huang X (2008) Table of radionuclides, vol 4 (A = 133 to 252). BIPM, Sèvres
2. International Atomic Energy Agency (IAEA) (2010) Analytical methodology for the determination of radium isotopes in environmental samples. IAEA Analytical Quality in Nuclear Applications Series No. 19
3. EPR (The Environmental Permitting (England and Wales) Regulations) (2010) Statutory Instruments 2043
4. Council Directive 2013/51/Euratom (2013) laying down requirements for the protection of the health of the general public with regard to radioactive substances in water intended for human consumption
5. Read D, Read G, Thorne M (2013) Background in the context of land contaminated with naturally occurring radioactive material. J Radiol Prot 33:367–380