bibliographicCitation |
Oyo-Ita OE, Ekpo BO, Oros DR, Simoneit BRT. Occurrence and Sources of Triterpenoid Methyl Ethers and Acetates in Sediments of the Cross-River System, Southeast Nigeria. International Journal of Analytical Chemistry. 2010;2010():1–8. doi: 10.1155/2010/502076. |