D elui <chr_var letter="s" var="long">∫</chr_var>eruir cel<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="dc" expan="qui" cert="no">q-vbar</chr_abbr> l<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>me<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr>n<chr_abbr type="reg" class="dc" expan="ent" cert="no">et-hbar</chr_abbr>. 