Synthesis, spectroscopic, SC-XRD/DFT and nonlinear optical (NLO) properties of chromene derivatives - Arif, Nadia; Shafiq, Zahid; Noureen, Sajida; Khalid, Muhammad; Ashraf, Abida; Yaqub, Muhammad; Irshad, Shabana; Khan, Muhammad Usman; Arshad, Muhammad Nadeem; Braga, Ataualpa Albert Carmo; Ragab, Ahmed H; Al-Mhyawi, Saedah R (RSC Advances, 2023)