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, a 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.