Morningstar Star Ratings and the Performance, Risk and Flows of European Bond Mutual Funds
Luis Otero-Gonzalez, Paulo Leite, Pablo Duran-Santomil, Renato Domingues
International Review Of Economics And Finance, vol. 82, 2022, p. 479-496.

Diversification and the Benefits of Using Returns Standardized by Range-Based Volatility Estimators
José Luis Miralles Quirós, Maria del Mar Miralles-Quiros, Jose Manuel Nogueira
International Journal Of Finance And Economics, vol. 24, 2019, p. 671-684.

Mean Driven Balance and Uniformly Best Linear Unbiased Estimators
Roman Zmyslony, João Mexia, Francisco Carvalho, Inês J. Sequeira
Statistical Papers, vol. 57, 2016, p. 43-53.