title: Noncoherent low-power upconversion in solid polymer films.
authors: Department of Chemistry and Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, USA.
authors: Radiy R
authors: RR
authors: Islangulov
authors: Joseph
authors: J
authors: Lott
authors: Christoph
authors: C
authors: Weder
authors: Felix N
authors: FN
authors: Castellano