1. Bigg G, Billings S (2014) The iceberg risk in the Titanic year of 1912: was it exceptional? Significance 11(3):6–10
2. ISO 1328-2:2020 (2020) Cylindrical gears—ISO system of flank tolerance classification—Part 2: definitions and allowable values of double flank radial composite deviations: general procedures. ISO, Geneva, Switzerland
3. ISO 17804:2020 (2020) Founding—Ausferritic spheroidal graphite cast irons—classification cylindrical gears. ISO, Geneva, Switzerland
4. AGMA 939-A07 (2018) Austempered ductile iron for gears—AGMA Information Sheet
5. DVB Bank SE Aviation Research (AR) (2014) An overview of commercial jet aircraft 2013, p 20