We thank you very much for the confidence, the work done, the speed and the various orientations for its successful completion. We also take the opportunity to thank your team for their open-mindedness.

Arnaud Edouard Yamadjako, University of Abomey-Calavi, Godomey, Benin

It was a beautiful experience publishing with EPJP. Finally, thank you very much for your kind consideration and also many thanks to the EPJP peer review team.

Muhammad Riaz, University of the Punjab, Lahore, Pakistan

We would like to thank the referee for very good and well intended remarks which helped us to improve our manuscript.

Marina-Aura Dariescu, "Alexandru Ioan Cuza" University of Iasi, Romania

The typing and the arrangement of tables and figures are perfect. Also, corrections to English and bibliography were appropriate. All together there is no correction to be made and I thank you for the excellent work. I would also thank you for the kind promptness in delivering the proofs.

Maurizio Consoli, Istituto Nazionale di Fisica Nucleare - Sezione di Catania, Italy

Thank you. We are indebted to the reviewers, Editor for their time and pinpoint comments and suggestions. I am also thankful for the Editorial office. The speed of the manuscript processing and the updates are too good.

Vemula Ramakrishna Reddy, IIT Hyderabad, India

I wish to congratulate the production staff for the precision in reproducing the text and the equations and formulas. It is not so frequent, nowadays.

Loris Ferrari, Università di Bologna, Italy

The authors wish to thank the anonymous reviewers for their helpful comments and suggestions. They are also grateful to EPJP for their corrections pertaining to the English language.

E. Tala-Tebue, University of Dschang, Bandjoun, Cameroon

I would like to express my gratitude to you for your efforts concerning my manuscript. Your expertise in choosing referee and the referee's valuable comments were excellent guide throughout the process of review.

E.K. Elmaghraby, Nuclear Research Center, Cairo, Egypt

We really appreciate your fast and very professional editing process.

Valérie Vidal, Université de Lyon, Ecole Normale Supérieure de Lyon - CNRS, France

Thank you very much once again for your excellent work.

Ignazio Ciufolini, Università del Salento, Lecce, Italy