| Literature Reports | Nm |
| Present study (4th order) | 3.290 |
| Bharti et al. [28] | 3.282 |
| Udhayakumar et al. [58] | 3.285 |
| Udhayakumar et al. [59] | 3.294 |
| Udhayakumar et al. [60] | 3.306 |
| Dennis et al. [61] | 3.480 |
| Apelt and Ledwich [62] | 3.255 |
| Badr [63] | 3.480 |
| Jafroudi and Yang [64] | 3.200 |
| Chen et al. [65] | 3.470 |
| Aldoss et al. [66] | 3.480 |
| Lange [67] | 3.280 |
| Sparrow [68] | 3.082 |
| Soareset al. [69] | 3.200 |
| Biswas and Sandip Sarkar [70] | 3.253 |
| Soareset al. [71] | 3.190 |
| Vimala et al. [72] | 3.313 |