Chavit G. Abalos, Krisha Mae Jemaima B. Cabe, Ej Alfred R. Manglal-lan, and Gaylord A. Frando, “Development of Non-Load Bearing Three-Core Stretcher Concrete Masonry Unit With Polyethylene Terephthalate Waste ”, The Vector, vol. 32, no. 1, Dec. 2023.