<chr_var letter="N" var="3">N3</chr_var> ei<chr_var letter="s" var="long">∫</chr_var> <chr_var letter="s" var="long">∫</chr_var>a<chr_abbr type="reg" class="dc" expan="int" cert="no">it-hbar</chr_abbr> martin <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr><chr_var letter="s" var="long">∫</chr_var>a<chr_abbr type="reg" class="dc" expan="int" cert="no">it-hbar</chr_abbr> ia<chr_var letter="s" var="long">∫</chr_var>que 