In particular, the Warsaw Convention has the following rules:
ɪ n WORD_BOUNDARY p ə ɹ t ɪ k j ʊ l ə ɹ WORD_BOUNDARY ð ə WORD_BOUNDARY w ɔ ɹ s ɔ WORD_BOUNDARY k ə n v ɛ n ʃ ə n WORD_BOUNDARY h ʌ z WORD_BOUNDARY ð ə WORD_BOUNDARY f ɑ l oʊ ɪ ŋ WORD_BOUNDARY ɹ uː l z WORD_BOUNDARY