1. ASTM International. ASTM Standard D87: Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve). https://www.astm.org/d0087-09r18.html.
2. ASTM International. ASTM Standard D938: Standard Test Method for Congealing Point of Petroleum Waxes, Including Petrolatum. https://www.astm.org/d0938-12r17.html.
3. ASTM International. ASTM Standard D1321: Standard Test Method for Needle Penetration of Petroleum Waxes. https://www.astm.org/d1321-16a.html.
4. ASTM International. ASTM Standard D1833: Standard Test Method for Odor of Petroleum Wax https://www.astm.org/d1833-87r17.html.
5. ASTM International. ASTM Standard D156: Standard Test Method for Saybolt Color of Petroleum Products (Saybolt Chromometer Method). https://www.astm.org/d0156-15.html.