5Ozkan, H E, et al. Instrumentation for measuring mixture variability in sprayer tanks [J]. Applied Engineering in Agriculture, 1999, 15(1): 19-24.
6Vondricka J, Schulze Lammers P. Measurement of mixture homogeneity in direct injection systems [J]. Transactions of the ASABE, 2009, 52(1): 61:66.
7Valluri S R, Jeffrey D J, et al. Some applications of the Lambert W func- tion to physics [J]. Canadian Journal of Physics, 2000, 79(9): 823-831.
8Ojeda C B, Rojas E S. Recent developments in derivative ultraviolet/visible absorption spectrophotometry [J]. Analytica Chimica Acta, 2004, 518(1-2): 1-24.