'Van der Pek's housing estates, like those of, for example, Berlage and J.C. van Epen (including in nearby Starlings Park), exhibited a quieter and more reserved character. This housing construction was architecturally inspired by traditional patriotic brick construction, but advanced typologically, both in terms of general forms of construction (including with open courtyards and consideration of orientation) and the actual house plans. These staunchly socialist architects had an eye for the social needs of their time and were therefore more open, for example, to standardization of floor plans than their purely aesthetically oriented professional brethren, without incidentally tying any form of artistry out of their designs.' J.C. van Epen and H.P. Berlage design housing on the Spreeuwenpark, | the paper notes that only W. Greve was involved with the experimental concrete houses. Yet A. Pet is responsible for the design of the concrete houses on Westduinweg. | Book on experiments in concrete construction, which includes a detailed description of Betondorp in Amsterdam and various ouevre lists of architects.