The phrase "available upon written request" is correct and usable in written English.
It is typically used in formal contexts to indicate that certain information or materials can be obtained if a written request is made.
Example: "The detailed report is available upon written request to the administration office."
Alternatives: "can be provided upon request" or "accessible through a written request".
Transcripts of all interviews conducted are stored on the primary author's password protected computer and are available upon written request, in keeping with data availability requirements.
§ 503.31 Records available upon written request under the Freedom of Information Act.
Notwithstanding any limitation contained in this section or any other provision of law, all information reported to or otherwise obtained by the Administrator (or any representative of the Administrator) under this chapter shall be made available, upon written request of any duly authorized committee of Congress, to such committee.
Notwithstanding any limitation contained in this section or any other provision of law, all information reported to, or otherwise obtained by, the Administrator (or any representative of the Administrator) under this chapter shall be made available, upon written request of any duly authorized committee of the Congress, to such committee.
A limited and de-identified version of the dataset analyzed in this study is available upon written request and upon approval by the institutional review boards of participating institutions.
The strains are also available upon written request to D.G.K.
In addition, copies of data extracted from the Commission's files through electronic media are available on a reimbursable basis, upon written request to the Public Reference Room.
The corresponding programming codes for computing a function concept consistency score are available upon a written request to the authors.
Codon usage for each coding sequence was calculated using an original program (available upon request) written in Strawberry Perl (http://strawberryperl.com/), and the resulting codon usage tables were used to determine the amino acid composition of the translated genome.
Perl and bash scripts (available upon request) were written in order to capture peak memory usage and execution time of alignments.
With the aim of comparing the effects of putting various threshold levels for methylation change, a custom script (will be made available upon request) was written which computes inverse correlation between expression and methylation for all regions in the dataset.
