No problem. &nbsp;Please follow the below styles. &nbsp;Thanks.<br /><br />Journal<br />[#] S.K. Roy, S. Sengupta, Gravity-assisted melting in a spherical enclosure: effects<br />of natural convection, Int. J. Heat Mass Transfer 33 (6) (1990) 1135-1147.<br /><br />G. Burban, V. Ayel, a. Alexandre, P. Lagonotte, Y. Bertin, C. Romestant, Experimental investigation of a pulsating heat pipe for hybrid vehicle applications, Appl. Therm. Eng. 50 (2013) 94&ndash;103. doi:10.1016/j.applthermaleng.2012.05.037.<br /><br />Proceedings<br />[#] T.S. Saitoh, H. Kato, H. Hoshina, Theoretical analysis for combined closecontact<br />and natural convection melting in ice storage spherical capsule, in:<br />Proc. Energy ConversionE ngineering Conference 1996. IECEC 96, vol. 3IEEE,<br />1996, pp. 2104-2108.<br /><br /><br />