| 2021-06-10 | Reference included | | | Naumova, Blagoev & Deltshev, 2021 |
| 2021-06-10 | Reference included | | | Jäger, 2021b |
| 2021-06-10 | Reference included | | | Huber, 2021 |
| 2021-06-10 | Reference included | | | Decae, Schwendinger & Hongpadharakiree, 2021 |
| 2021-06-10 | Reference included | | | Suzuki, Aung & Ono, 2021 |
| 2021-06-10 | Reference included | | | Zhu & Li, 2021c |
| 2021-06-10 | Reference included | | | Schult, Preik & Kirschner, 2021 |
| 2021-06-05 | Reference included | | | Cai, Lin & Zhong, 2021 |
| 2021-06-05 | Reference included | | | Zamani et al., 2021a |
| 2021-06-03 | Reference included | | | Rubio, 2021 |
| 2021-06-02 | Reference included | | | Orozco-Gil & Desales-Lara, 2021 |
| 2021-06-02 | Reference included | | | Crespo et al., 2021a |
| 2021-06-02 | Reference included | | | Danışman & Erdek, 2021 |
| 2021-06-02 | Reference included | | | Coşar, 2021b |
| 2021-06-02 | Reference included | | | Akhtar & Summer, 2021 |
| 2021-06-02 | Reference included | | | Prasad et al., 2021a |
| 2021-06-01 | Reference included | | | Prajapati, 2021 |
| 2021-05-28 | Reference included | | | Danışman & Coşar, 2021b |
| 2021-05-28 | Reference included | | | Lu, Wu & Zhang, 2021 |
| 2021-05-28 | Reference included | | | Wei, Li & Lin, 2021 |
| 2021-05-28 | Reference included | | | Ying et al., 2021 |
| 2021-05-28 | Reference included | | | Yu, Zhang & Zhang, 2021b |
| 2021-05-28 | Reference included | | | Arnedo & Hormiga, 2021 |
| 2021-05-28 | Reference included | | | Wang, Wang & Peng, 2021 |
| 2021-05-28 | Reference included | | | Yu, Zhang & Zhang, 2021a |
| 2021-05-28 | Reference included | | | Liu, Zhang & Chen, 2021 |
| 2021-05-28 | Reference included | | | Chen et al., 2021b |
| 2021-05-27 | Reference included | | | Martyn, 1793 |
| 2021-05-26 | Reference included | | | Bertkau, 1875 |
| 2021-05-25 | Reference included | | | Yong et al., 2021 |
| 2021-05-25 | Reference included | | | Sankaran, Caleb & Sebastian, 2021d |
| 2021-05-25 | Reference included | | | El-Hennawy & Al-Saraireh, 2021 |
| 2021-05-25 | Reference included | | | Seyyar, 2021 |
| 2021-05-21 | Reference included | | | Tang et al., 2021 |
| 2021-05-21 | Reference included | | | Sankaran, Caleb & Sebastian, 2021c |
| 2021-05-21 | Reference included | | | Liu et al., 2021c |
| 2021-05-18 | Reference included | | | Perger & Dupérré, 2021 |
| 2021-05-17 | Reference included | | | Purgat et al., 2021a |
| 2021-05-16 | Reference included | | | Lin & Li, 2021 |
| 2021-05-14 | Reference included | | | Chen et al., 2021a |
| 2021-05-14 | Reference included | | | Xie, Liu & Peng, 2021 |
| 2021-05-13 | Reference included | | | Rubio, Stolar & Baigorria, 2021 |
| 2021-05-13 | Reference included | | | Coşar & Erdek, 2021 |
| 2021-05-12 | Reference included | | | Yao, Wang & Li, 2021 |
| 2021-05-12 | Reference included | | | Wilson et al., 2021a |
| 2021-05-11 | Reference included | | | Huang et al., 2021b |
| 2021-05-10 | Reference included | | | Perger & Rubio, 2021b |
| 2021-05-09 | Reference included | | | Rozwałka & Czaja, 2021b |
| 2021-05-09 | Reference included | | | Rozwałka & Czaja, 2021a |
| 2021-05-06 | Reference included | | | Rodrigues, Marta & Figueiredo, 2021 |