BrahmjnAnavalimAla (BJVM) means Garland of Knowledge of Brahman. It is attributed to ShankarAchArya. It has 21 verses. Brahman is the reality, world is mithyA and jIva is not different from Brahman is in verse 20. The verse adds that it is the correct understanding of shAstra  and that it is the claim of vedAnta.
BJVM summarizes various aspects of vedAntic teaching directly without explanations. As such, it is meant for nidhidhyAsana though verse 1 says that listening it once gives BrahmjnAna and moksha.
Self-knowledge is unfractured (akhandakAra) vritti. In verses 2 and 18, the phrase punah-punah (repetition) occurs. The idea probably is that BJVM should be chanted repeatedly so as to make jnAna vritti firm.                                                                        The verse 18 says: “He who realizes after repeated contemplation (emphasis added) that he is a mere witness; he alone is liberated. He is the enlightened one. This is proclaimed by Vedanta.”                                                                                                      Links to the text and chanting are below.
Brahma Jnanavali Mala | Vedanta Shastras Library
https://www.youtube.com/watch?v=BF8zi90QLEA&list=RDBF8zi90QLEA&start_radio=1