| article html file updated | 24 December 2025 14:12 CET | Update | https://www.mdpi.com/2079-9721/6/1/21 |
| article html file updated | 30 August 2025 03:01 CEST | Update | N/A |
| article html file updated | 21 August 2025 19:42 CEST | Update | N/A |
| article html file updated | 9 February 2020 09:50 CET | Update | N/A |
| article html file updated | 1 October 2019 15:05 CEST | Update | N/A |
| article html file updated | 1 May 2019 11:46 CEST | Update | N/A |
| article html file updated | 17 April 2019 11:33 CEST | Update | N/A |
| article html file updated | 29 March 2019 06:32 CET | Update | N/A |
| article html file updated | 27 March 2018 14:47 CEST | Update | N/A |
| article html file updated | 14 March 2018 20:16 CET | Original file | N/A |
| article xml uploaded. | 14 March 2018 14:43 CET | Original file | https://www.mdpi.com/2079-9721/6/1/21/xml |
| article pdf uploaded. | 14 March 2018 14:43 CET | Version of Record | https://www.mdpi.com/2079-9721/6/1/21/pdf |
