References – SN 45.159: The Guest House 
Readings by Ajahn Karuṇadhammo: [Aggregates]
Sutta: SN 45.159, Maggasaṁyutta, “The Guest House.”
Sutta: SN 5.10, Bhikkhunīsaṁyutta, “Vajirā.”
The Questions of King Milinda, I.i, “No Person is Found,” p. 29-32 (Milindapañha 25).
The Fourth Foundation of Mindfulness [2013], Session 27
SN 45.159 relates the Five Aggregates to the First Noble Truth, which must be understood. Teaching by Ajahn Karuṇadhammo. [Noble Truth of Suffering] [Aggregates] // [Characteristics of existence]
The Fourth Foundation of Mindfulness [2013], Session 27, Excerpt 1