Chetan Chhikara ; H Vijaya Pai ; C Ganesh Pai http://www.ijo.in/article.asp?issn=0301-4738;year=2021;volume=69;issue=5;spage=1084;epage=1087;aulast=Chhikara.
,
2021
Sudha Menon ; Praveena S Kumar ; H Vijaya Pai http://www.jcor.in/article.asp?issn=2320-3897;year=2021;volume=9;issue=1;spage=34;epage=37;aulast=Menon.
,
2021