J. Prathumsit, S. Suchat, W. Phaengam, A. Sansomboon, and W. kerdsang, “AN INVESTIGATION OF PHOTOSYNTHETICALLY ACTIVE RADIATION AT PHRANAKHON RATJABHAT UNIVERSITY, THAILAND”, Suranaree J Sci Technol, vol. 27, no. 2, pp. 030013(1–4), Aug. 2026.