Misleading description of first and second order ambisonic systems

With regards to the paper Llopis, H. S., Pind, F., & Jeong, C. H. (2020). Development of an auditory virtual reality system based on pre-computed B-format impulse responses for building design evaluation. Building and Environment, 169, 106553. (https://doi-org.salford.idm.oclc.org/10.1016/j.buildenv.2019.106553)