| ชื่อสมการ | รูปแบบสมการ | อ้างอิง |
| Newton | MR = exp (-kt) | Lui, 1997 |
| Page | MR = exp (-kty) | Sharma, 2001 |
| Henderson and Pabis | MR = a exp (-kt) | Doymaz, 2004 |
| Wang and Singh | MR = 1 + at + bt2 | Ozdemir, 1999 |
| Two term exponential | MR = a exp (-kt) + (1-a) exp (-kat) | Ruiz, 2008 |
| Modified Page | MR = exp (- (kt) y) | Diamante, 1993 |
| Logarithmic | MR = a exp (-kt) +c | Togrul, 2002 |
| Approximation of diffusion | MR = a exp (-kt) + (1-a) exp (-kbt) | Yaldiz, 2001 |
| Verma et al. | MR = a exp (-kt) + (1-a) exp (-gt) | Verma, 1985 |
| Midilli | MR = a exp (-ktn) +bt | Midilli, 2002 |
| Two term | MR = a exp (-k1t) +b exp (-k2t) | Rahman, 1998 |
| Modified Henderson and Pabis | MR = a exp (-kt) +b exp (-gt) +c exp (-ht) | Karathanos, 1999 |