| article html file updated | 29 August 2025 23:09 CEST | Update | https://www.mdpi.com/2076-393X/4/2/20 |
| article html file updated | 16 July 2022 02:30 CEST | Update | - |
| article html file updated | 7 February 2020 09:23 CET | Update | - |
| article html file updated | 21 September 2019 17:59 CEST | Update | - |
| article html file updated | 5 May 2019 14:29 CEST | Update | - |
| article html file updated | 27 March 2019 05:56 CET | Update | - |
| article html file updated | 4 July 2016 11:49 CEST | Update | - |
| article html file updated | 27 May 2016 12:00 CEST | Original file | - |
| article xml uploaded. | 27 May 2016 11:04 CEST | Original file | https://www.mdpi.com/2076-393X/4/2/20/xml |
| article pdf uploaded. | 27 May 2016 11:04 CEST | Version of Record | https://www.mdpi.com/2076-393X/4/2/20/pdf |