Erratum

In the original published version of this article [1], the third co-author’s name Kothari Dwarkadas Pralhaddas appears twice, and the name of the second co-author Alagan Anpalagan is missing. The correct author list is as follows:

Vijayalakshmi Saravanan, Alagan Anpalagan, Kothari Dwarkadas Pralhaddas and Isaac Woungang

The publisher apologies for this error introduced during publication of this article.