Захарчук, М.М., Н.О. Сидоренко, and В.М. Ледовських. 2008. “Potentiometric Method for Determination of Manganese Additives for Fuels”. Proceedings of National Aviation University (archive) 37 (4):137-39. https://doi.org/10.18372/2306-1472.37.1649.