| article html file updated | 8 February 2020 03:40 CET | Update | https://www.mdpi.com/1999-4907/8/4/121 |
| article html file updated | 24 September 2019 08:11 CEST | Update | N/A |
| article html file updated | 4 May 2019 02:05 CEST | Update | N/A |
| article html file updated | 28 April 2017 06:43 CEST | Update | N/A |
| article html file updated | 24 April 2017 04:17 CEST | Update | N/A |
| article xml uploaded. | 24 April 2017 04:16 CEST | Update | https://www.mdpi.com/1999-4907/8/4/121/xml |
| article pdf uploaded. | 24 April 2017 04:16 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/4/121/pdf |
| article html file updated | 18 April 2017 06:42 CEST | Original file | N/A |
| article pdf uploaded. | 18 April 2017 06:40 CEST | Updated version of record | https://www.mdpi.com/1999-4907/8/4/121/pdf-vor |
| article pdf uploaded. | 15 April 2017 07:10 CEST | Version of Record | https://www.mdpi.com/1999-4907/8/4/121/pdf-vor |
