1. Oxalate in human seminal plasma: possible significance and problems of oxalate determination 
Matthias Eiss, M.D., Georg Schieferstein, M.D., Richard Wahl, M.D. 
Fertility and Sterility 
Volume 73, Issue 5, Pages (May 2000)
DOI: /S (00)

2. FIGURE 1
Increase in oxalic acid as a function of storage time. Symbols represent seven different samples. Mean regression line (Mean Reg): y = 1.01x
Eiss. Oxalate in seminal plasma. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

3. FIGURE 2
Oxalic acid concentration in seminal plasma plotted against percentage of sperm with abnormal heads (n = 86).
Eiss. Oxalate in seminal plasma. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

4. FIGURE 3
Oxalic acid concentration in seminal plasma plotted against pH (n = 100). In the upper line, some of the boxes overlap.
Eiss. Oxalate in seminal plasma. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

5. FIGURE 4
Oxalic acid concentration in seminal plasma plotted against donor age (n = 100).
Eiss. Oxalate in seminal plasma. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )

6. FIGURE 5
Oxalic acid concentration in seminal plasma plotted against ejaculate volume (n = 100).
Eiss. Oxalate in seminal plasma. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (00) )