Uji stabilitas fisik dan penentuan nilai SPF secara in vitro dari krim tabir surya yang mengandung butil metoksidibenzoilmetan dan oktil metoksisinamat dengan penambahan titanium dioksida = Physical stability test and in vitro determination of SPF value from sunscreen cream containing butyl methoxydibenzoylmethane and octyl methoxycinnamate with addition of titanium dioxide.