Cite

    Marina Musa et al.. “Graphene-magnetite as adsorbent for magnetic solid phase extraction of 4-hydroxybenzoic acid and 3, 4-dihydroxybenzoic acid in stingless bee honey.” Food chemistry, vol. 265, 2018, pp. 165–172. http://access.bl.uk/ark:/81055/vdc_100066429124.0x00003f