How Montreal Made Ammonia Safe for Its Rinks
By Colleen O'Shea June 8, 2021
https://www.hpacmag.com/features/how-montreal-made-ammonia-safe-for-its-rinks/
VISITE D’UNE SALLE MÉCANIQUE L’ESPLANADE TRANQUILLE À MONTRÉAL
Climapresse - decembre 2021 - page 13
https://cetaf.qc.ca/client_file/upload/pdf/Climapresse/Climapresse_202112.pdf
Reducing ammonia refrigerant charge in skating rink refrigeration systems
IIAR CONDENSER - pages 36-40