Dear Authors,
Your original manuscript has received resonable evaluations from the three referees, who have also raised a few concerns and suggested some changes in some parts of the manuscript. Among the various flaws, there is quite a consensus among the referees that the presentation quality of your paper is rather fair and thus needs to be improved considerably. I have also to say that overall the paper is difficult to read, often with interweaving sentences, and this can be a significant drawback from the readership viewpoint. Your paper can thus be transferred to the subsequent step of the journal, but it requires major revisions and possibly an additional reviewing phase.

Dear Authors,
Actually your revised manuscript may require just a few minor changes. This is why, after a quick appraisal from one of the previous referee, I made this evaluation before the final acceptance.

Dear Authors:
Your revised version, together with your reply, were evaluated positively from one of the previous referee and myself. The paper can now be accepted as it is. Congratulations!
Nunzio Romano