De Levie, Robert (1993). "Explicit expressions of the general form of the titration curve in terms of concentration: Writing a single closed-form expression for the titration curve for a variety of titrations without using approximations or segmentation". Journal of Chemical Education. 70 (3): 209. Bibcode:1993JChEd..70..209D. doi:10.1021/ed070p209.
De Levie, Robert (1993). "Explicit expressions of the general form of the titration curve in terms of concentration: Writing a single closed-form expression for the titration curve for a variety of titrations without using approximations or segmentation". Journal of Chemical Education. 70 (3): 209. Bibcode:1993JChEd..70..209D. doi:10.1021/ed070p209.