Cooper, J. E., Davis, W. C., Knippel, B. C., Marcus, R. K., Rice, J. K., Smith, D. W., Jr., & Spraul, B. K. Use of sol-gels as solid matrixes for simultaneous multielement determination by radio frequency glow discharge optical emission spectrometry: Determinations of suspended particulate matter.

Cooper, Julia E., W. Clay Davis, Brad C. Knippel, R. Kenneth Marcus, Jeanette K. Rice, Dennis W. Smith, Jr, και Bryan K. Spraul. Use of Sol-gels As Solid Matrixes for Simultaneous Multielement Determination By Radio Frequency Glow Discharge Optical Emission Spectrometry: Determinations of Suspended Particulate Matter.

Cooper, Julia E., et al. Use of Sol-gels As Solid Matrixes for Simultaneous Multielement Determination By Radio Frequency Glow Discharge Optical Emission Spectrometry: Determinations of Suspended Particulate Matter.