1. ASTM-E1417. Standard Practice for Liquid Penetrant Testing. - ASTM Int., 2013. - 11 p.

2. AMS-2644. Inspection Material, Penetrant. - SAE Int., 2013. - 28 p.

3. ASTM E165-95. Standard Test Method for Liquid Penetrant Examination. - ASTM Int., 1995. - 20 p.

4. ASTM E1209-99. Standard Test Method for Fluorescent Liquid Penetrant Examination Using the Water-Washable Process. - ASTM Int., 1999. - 6 p.

5. EN ISO 3452-2:2013. Non-destructive testing - Penetrant testing - Part 2: Testing of penetrant materials. - 24 p.

6. BS EN ISO 3452-1:2013. Non-destructive testing. Penetrant testing. General principles. - BCI, 2013. - 34 p.