| article html file updated | 30 August 2025 02:33 CEST | Update | https://www.mdpi.com/2076-0817/7/1/21 |
| article html file updated | 16 July 2022 09:08 CEST | Update | N/A |
| article html file updated | 9 February 2020 05:59 CET | Update | N/A |
| article html file updated | 30 September 2019 15:36 CEST | Update | N/A |
| article html file updated | 1 May 2019 19:53 CEST | Update | N/A |
| article html file updated | 17 April 2019 18:59 CEST | Update | N/A |
| article html file updated | 28 March 2019 21:58 CET | Update | N/A |
| article html file updated | 26 March 2018 17:18 CEST | Update | N/A |
| article html file updated | 8 February 2018 17:01 CET | Original file | N/A |
| article xml uploaded. | 8 February 2018 17:00 CET | Original file | https://www.mdpi.com/2076-0817/7/1/21/xml |
| article pdf uploaded. | 8 February 2018 17:00 CET | Version of Record | https://www.mdpi.com/2076-0817/7/1/21/pdf |
