Nattawut Chaimananun. 2010. The study of cat-litter preparation from phosphogypsum with paper and coconut coir. Bangkok:King Mongkut's University of Technology Thonburi; DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/KMUTT.res.2010.28

Nattawut Chaimananun. The study of cat-litter preparation from phosphogypsum with paper and coconut coir. Bangkok:King Mongkut's University of Technology Thonburi, 2010. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/KMUTT.res.2010.28

Nattawut Chaimananun. (2010) The study of cat-litter preparation from phosphogypsum with paper and coconut coir (รายงานผลงานวิจัย). King Mongkut's University of Technology Thonburi:Bangkok. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/KMUTT.res.2010.28