| article html file updated | 8 February 2020 06:21 CET | Update | https://www.mdpi.com/2305-6304/5/2/12 |
| article html file updated | 24 September 2019 22:28 CEST | Update | - |
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| article html file updated | 29 June 2017 11:58 CEST | Update | - |
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| article xml uploaded. | 22 May 2017 05:21 CEST | Update | https://www.mdpi.com/2305-6304/5/2/12/xml |
| article pdf uploaded. | 22 May 2017 05:21 CEST | Updated version of record | https://www.mdpi.com/2305-6304/5/2/12/pdf |
| article pdf uploaded. | 20 May 2017 14:14 CEST | Version of Record | https://www.mdpi.com/2305-6304/5/2/12/pdf-vor |
