DOI: https://doi.org/10.18597/rcog.1957
DOI: https://doi.org/10.18597/rcog.1961
DOI: https://doi.org/10.18597/rcog.1968
DOI: https://doi.org/10.18597/rcog.3008
DOI: https://doi.org/10.18597/rcog.1979
DOI: https://doi.org/10.18597/rcog.1983
DOI: https://doi.org/10.18597/rcog.2004
DOI: https://doi.org/10.18597/rcog.2005