ternal-link">https://archive.ics.uci.edu/ml/datasets/Air+quality</a></p>
    </div>
    <div id="references">
    <h2>References</h2>
    <p>De Vito, S., Massera E., Piga M., Martinotto L. and Di Francia G. (2008).
On field calibration of an electronic nose for
benzene estimation in an urban pollution monitoring scenario
<em>Sensors and Actuators B: Chemical</em>, 129: 50-757.
&lt;doi:10.1016/j.snb.2007.09.060&gt;</p>
<p>Xin Qi and Ruiyan Luo (2019).
Nonlinear function on function
additive model with multip