| article html file updated | 13 August 2026 18:18 CEST | Update | https://www.mdpi.com/1999-4915/7/4/1987 |
| article html file updated | 6 February 2020 17:41 CET | Update | N/A |
| article html file updated | 6 May 2019 21:54 CEST | Update | N/A |
| article html file updated | 26 March 2019 00:42 CET | Update | N/A |
| article html file updated | 21 August 2015 10:29 CEST | Update | N/A |
| article html file updated | 29 April 2015 04:01 CEST | Original file | N/A |
| article xml file uploaded | 29 April 2015 04:01 CEST | Original file | https://www.mdpi.com/1999-4915/7/4/1987/xml |
| article pdf uploaded. | 15 April 2015 13:39 CEST | Version of Record | https://www.mdpi.com/1999-4915/7/4/1987/pdf |
