hɪz bˈʊks ɔnðə fˈaɪnaɪt ˈɛlɪmənt mˈɛθəd wɜː ðə fˈɜːst tə pɹɪzˈɛnt ðə sˈʌbdʒɛkt ænd tə ðɪs dˈeɪ ɹᵻmˈeɪn ðə stˈændɚd ɹˈɛfɹəns tˈɛksts.
His books on the Finite Element Method were the first to present the subject and to this day remain the standard reference texts.