I periodically do a bit of egosurfing on google. Usually, the results for 'Nirmaldasan' are not very flattering. But recently I came across an article that uses my green density measure. The article by Archana Dahiya is titled 'Ecological Aspects in the Selected Poems of Toru Dutt, Sarojini Naidu and Kamala Das and Green Density Measure', published in Language in India, www.languageinindia.com ISSN 1930-2940 Vol. 13:5 May 2013. And here's the link:

My original article titled 'Green Density Measure Of A Literary Text' appeared in Essays In Ecocriticism, 2007. A google search will fetch you the book.