Anusheela , N., Shreemathi Adiga, and M. A. Gopalan. 2023. “The Negative Pell Equation Y2 = 90x2 - 36: A Mathematical Observation”. Research and Applications Towards Mathematics and Computer Science Vol. 4, September, 44-50. https://doi.org/10.9734/bpi/ratmcs/v4/6180B.