| article html file updated | 7 February 2020 07:17 CET | Update | https://www.mdpi.com/1420-3049/21/4/491 |
| article html file updated | 21 September 2019 15:11 CEST | Update | N/A |
| article html file updated | 5 May 2019 18:37 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:54 CET | Update | N/A |
| article html file updated | 17 September 2018 04:03 CEST | Update | N/A |
| article html file updated | 28 April 2016 11:54 CEST | Update | N/A |
| article html file updated | 14 April 2016 14:05 CEST | Original file | N/A |
| article xml uploaded. | 14 April 2016 14:04 CEST | Update | https://www.mdpi.com/1420-3049/21/4/491/xml |
| article pdf uploaded. | 14 April 2016 14:04 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/491/pdf |
