BSG Global,
https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10 https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10…
https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10 https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10…
https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10 https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10
http://link.springer.com/chapter/10.1007/978-981-10-3518-0_10 http://link.springer.com/chapter/10.1007/978-981-10-3518-0_10…
https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10 https://link.springer.com/chapter/10.1007/978-981-10-3518-0_10…