Chapman RA, Cole CM (1982)
Observations on the influence of water and soil pH on the persistence of insecticides
J Environ Sci Health [B] 17: 487

Chapman RA, Harris CR (1979)
Determination of residues of methomyl and oxamyl and their oximes in crops by gas-liquid chromatography of oxime trimethylsilyl ethers
Journal of Chromatography 171: 249