K. K. Saju and  A. R. Reghuraj,  Investigation into Black Oxide Coating of 410 Grade Surgical Stainless Steel Using Alkaline Bath Treatment.   journal   = {International Journal of Pharmacological and Pharmaceutical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 113(5). 276 - 280
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/10004540.