Use snippet like this: <link href="https://lib.relast.de/css/headings_numbers.css" rel="stylesheet">.
For the whole Stylesheet: <link href="https://lib.relast.de/relast.css.php" rel="stylesheet">.
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Reference
Use snippet like this: <script src="https://lib.relast.de/js/pad0.js"></script>.
For the whole JavaScript: <script src="https://lib.relast.de/relast.js.php"></script>.
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Use it like this: <img src="https://lib.relast.de/svg/red_dot.svg">
Which results in something like this:
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Use it like this: <img src="https://lib.relast.de/gif/smile.gif">
Which results in something like this: 
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