| article html file updated | 30 August 2025 02:09 CEST | Update | https://www.mdpi.com/2218-1997/4/1/7 |
| article html file updated | 21 August 2025 19:28 CEST | Update | N/A |
| article html file updated | 16 July 2022 08:19 CEST | Update | N/A |
| article html file updated | 9 February 2020 01:56 CET | Update | N/A |
| article html file updated | 29 September 2019 15:56 CEST | Update | N/A |
| article html file updated | 2 May 2019 04:34 CEST | Update | N/A |
| article html file updated | 18 April 2019 02:38 CEST | Update | N/A |
| article html file updated | 28 March 2019 12:57 CET | Update | N/A |
| article html file updated | 1 February 2018 11:47 CET | Update | N/A |
| article pdf uploaded. | 23 January 2018 06:45 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/1/7/pdf |
| article html file updated | 5 January 2018 10:29 CET | Update | N/A |
| article xml uploaded. | 5 January 2018 10:28 CET | Update | https://www.mdpi.com/2218-1997/4/1/7/xml |
| article pdf uploaded. | 5 January 2018 10:28 CET | Updated version of record | https://www.mdpi.com/2218-1997/4/1/7/pdf-vor |
| article html file updated | 3 January 2018 17:11 CET | Original file | N/A |
| article pdf uploaded. | 3 January 2018 17:09 CET | Version of Record | https://www.mdpi.com/2218-1997/4/1/7/pdf-vor |
