@article{numericalapproximationoftheimplied,
  title = {Numerical Approximation of the Implied Volatility Under Arithmetic Brownian Motion},
  author = {Jaehyuk Choi and Kwangmoon Kim and Minsuk Kwak},
  year = {2009},
  url = {https://www.tandfonline.com/doi/abs/10.1080/13504860802583436},
}