JAGADESAN, S.; SUBRAMANIAN, M. V. Study on Sunspots, Ozone and earth atmosphere variation at Pudukkottai, Tamilnadu (latitude: 100 23’ and longitude 780 52’). International Journal of Science and Engineering Invention, [S. l.], p. 205 to 212, 2016. DOI: 10.23958/ijsei/vol02-i07/05. Disponível em: http://ijsei.in/index.php/ijsei/article/view/34. Acesso em: 1 may. 2024.