@article{article2002,
  title = {The role of hybrid nanofluids in optimizing parabolic trough concentrator performance: A comprehensive review},
  author = {GUPTA, S.K. and KUMARI, S.},
  journal = {Sigma Journal of Engineering and Natural Sciences},
  year = {2026},
  volume = {44},
  pages = {698-719},
  doi = {10.14744/sigma.2026.2022}
}