Sugiono,S , , Putro,W W , , Lustyana,A T , , Fanani,A A , , Pratama,A H , , Lubis,D Z , and Sudjono,H . "Increased Thermal Comfort of Motorcycle Helmet Users with the Addition of Phase Change Material" .e32997 , International Journal of Environmental Health Engineering (IJEHE), 2025, July, 2025, e32997. doi: 10.4103/ijehe.ijehe_18_24