@misc{2150ferreiranull,
  author       = {Ferreira, Helder},
  howpublished = {Personal communication},
  title        = {None},
  year         = {NULL}
}

TY  - STD
AU  - Ferreira, Helder
PY  - NULL
DA  - NULL//
TI  - None
PB  - Personal communication
ID  - 2150ferreiranull
ER  - 

<?xml version="1.0" encoding="UTF-8"?>
<modsCollection xmlns="http://www.loc.gov/mods/v3">
<mods ID="2150ferreiranull">
    <titleInfo>
        <title>None</title>
    </titleInfo>
    <name type="personal">
        <namePart type="given">Helder</namePart>
        <namePart type="family">Ferreira</namePart>
        <role>
            <roleTerm authority="marcrelator" type="text">author</roleTerm>
        </role>
    </name>
    <originInfo>
        <dateIssued>NULL</dateIssued>
        <publisher>Personal communication</publisher>
    </originInfo>
    <identifier type="citekey">2150ferreiranull</identifier>
</mods>
</modsCollection>