Howard, Irmgard (2002). “H Is for Enthalpy, Thanks to Heike Kamerlingh Onnes and Alfred W. Porter”. Journal of Chemical Education. 79 (6): 697. Bibcode:2002JChEd..79..697H. doi:10.1021/ed079p697.
Howard, Irmgard (2002). “H Is for Enthalpy, Thanks to Heike Kamerlingh Onnes and Alfred W. Porter”. Journal of Chemical Education. 79 (6): 697. Bibcode:2002JChEd..79..697H. doi:10.1021/ed079p697.