A two-stage convolutional gated recurrent unit with multi-head attention and regularization for multi-step ahead prediction of particulate air pollutantsSaira Mudassar, Aneela Zameer, Abdul Rehman, Rubina Nasir and Muhammad Asif Zahoor RajaEur. Phys. J. Plus, 141 1 (2026) 22DOI: https://doi.org/10.1140/epjp/s13360-025-07234-8