NIELSEN, Morten; RASMUSSEN, Morten Grud. Projection operators on matrix weighted $L^p$ and a simple sufficient Muckenhoupt condition. Mathematica Scandinavica, Berkeley, CA, United States, v. 123, n. 1, p. 72–84, 2018. DOI: 10.7146/math.scand.a-103316. Disponível em: https://journals.msp.org/mscand/article/view/271. Acesso em: 24 jul. 2026.