1. 4 Channel VOYAGER Adjustable Tip Spacing Pipettes | INTEGRA. (2021). INTEGRA Shop US. Retrieved January 14, 2021, from https://shop.integra-biosciences.com/products/4-channel-voyager-adjustable-tip-spacing-pipettes
2. Finnpipette F2 Multichannel Pipettes. (2021). Retrieved January 14, 2021, from https://www.thermofisher.com/order/catalog/product/4662000
3. Four E’s Scientific Adjustable Volume Multichannel Pipettes 8 Channel 0.5–10 uL: Amazon.com: Industrial & Scientific. (2021). Retrieved January 14, 2021, from https://www.amazon.com/Scientific-Adjustable-Multichannel-Pipettes-0-5-10uL/dp/B01IP5Q19K/ref=zg_bs_318127011_1
4. A Five-Year Study of Replacement Costs of Pipettes;Laboratory Medicine,1970